• What is the MA of this lever?
– MA = length of effort arm ÷ length of resistance arm.
Copyright © 2010 Ryan P. Murphy
6 ...
• RED SLIDE: These are notes that are very
important and should be recorded in your
science journal.
Copyright © 2010 Ryan...
-Nice neat notes that are legible and use indentations
when appropriate.
-Example of indent.
-Skip a line between topics
-...
• RED SLIDE: These are notes that are very
important and should be recorded in your
science journal.
• BLACK SLIDE: Pay at...
• http://sciencepowerpoint.com/
 Machine: Anything that helps you do
work.
 Machine: Anything that helps you do
work.
 Work = Force x Distance
• Which of the following is not something
machines do.
– B.) Machines can change the direction of the
force you put in. ( ...
• Which of the following is not something
machines do.
– A.) Machines can make the force you put into a
machine greater. (...
• Which of the following is not something
machines do.
– A.) Machines can make the force you put into a
machine greater. (...
• Which of the following is not something
machines do.
– A.) Machines can make the force you put into a
machine greater. (...
• Which of the following is not something
machines do.
– A.) Machines can make the force you put into a
machine greater. (...
• Which of the following is not something
machines do.
– A.) Machines can make the force you put into a
machine greater. (...
• Which of the following is not something
machines do.
– A.) Machines can make the force you put into a
machine greater. (...
• Match the correct work
of machines to the
picture.
– A.) Machines can
increase the speed of
the force.
– B.) Machines ca...
• Match the correct work
of machines to the
picture.
– A.) Machines can
increase the speed of
the force.
– B.) Machines ca...
• Match the correct work
of machines to the
picture.
– A.) Machines can
increase the speed of
the force.
– B.) Machines ca...
• Match the correct work
of machines to the
picture.
– A.) Machines can
increase the speed of
the force.
– B.) Machines ca...
• Match the correct work
of machines to the
picture.
– A.) Machines can
increase the speed of
the force.
– B.) Machines ca...
• Match the correct work
of machines to the
picture.
– A.) Machines can
increase the speed of
the force.
– B.) Machines ca...
• Match the correct work
of machines to the
picture.
– A.) Machines can
increase the speed of
the force.
– B.) Machines ca...
• Law Conservation of energy: energy
cannot be created or destroyed.
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
 Efficiency: A measure of how much more
work must be put into a machine than you
get out of the machine.
 Efficiency: A measure of how much more
work must be put into a machine than you
get out of the machine.
 The efficiency...
• Efficiency: A measure of how much more
work must be put into a machine than you
get out of the machine.
– The efficiency...
• Efficiency: A measure of how much more
work must be put into a machine than you
get out of the machine.
– The efficiency...
• Efficiency: A measure of how much more
work must be put into a machine than you
get out of the machine.
– The efficiency...
 Force is measured in a unit called the Newton.
Copyright © 2010 Ryan P. Murphy
 Force is measured in a unit called the Newton.
Copyright © 2010 Ryan P. Murphy
 Force is measured in a unit called the Newton.
Copyright © 2010 Ryan P. Murphy
 Force is measured in a unit called the Newton.
Copyright © 2010 Ryan P. Murphy
 Force is measured in a unit called the Newton.
Copyright © 2010 Ryan P. Murphy
 Force is measured in a unit called the Newton.
Copyright © 2010 Ryan P. Murphy
 Force is measured in a unit called the Newton.
Copyright © 2010 Ryan P. Murphy
 Force is measured in a unit called the Newton.
Copyright © 2010 Ryan P. Murphy
 Force is measured in a unit called the Newton.
Copyright © 2010 Ryan P. Murphy
 Force is measured in a unit called the Newton.
Copyright © 2010 Ryan P. Murphy
 One Newton is the amount of force required
to give a 1 kg mass an acceleration of 1
m/s/s.
Copyright © 2010 Ryan P. Murp...
 One Newton is the amount of force required
to give a 1 kg mass an acceleration of 1
m/s/s.
Copyright © 2010 Ryan P. Murp...
 One Newton is the amount of force required
to give a 1 kg mass an acceleration of 1
m/s/s.
Copyright © 2010 Ryan P. Murp...
• One Newton is the amount of force required
to give a 1 kg mass an acceleration of 1
m/s/s.
Copyright © 2010 Ryan P. Murp...
• One Newton is the amount of force required
to give a 1 kg mass an acceleration of 1
m/s/s.
Copyright © 2010 Ryan P. Murp...
 Mass: Amount of matter in an object.
Copyright © 2010 Ryan P. Murphy
Copyright © 2010 Ryan P. Murphy
“I’m
weightless
but I still
have mass.”
Copyright © 2010 Ryan P. Murphy
 New Area of focus: Simple Machines.
Copyright © 2010 Ryan P. Murphy
• Activity: Ancient use of Simple Machines.
– Use PVC piping to move an upside down lab
table and some people sitting on i...
• Set-up of challenge.
– Move pipes from the rear to the front before
the table moves.
– How efficient can your group work?
• Please reflect upon the activity.
– What type of machine was used?
– Did it help?
Copyright © 2010 Ryan P. Murphy
 Mechanical advantage (MA): The number
of times a machine multiplies your effort
force.
Copyright © 2010 Ryan P. Murphy
 To find MA
 Divide resistance force (usually weight in g)
by the effort force (Newtons)
Copyright © 2010 Ryan P. Murphy
 To find MA
 Divide resistance force (usually weight in g)
by the effort force (Newton)
Copyright © 2010 Ryan P. Murphy
 To find MA
 Divide resistance force (usually weight in g)
by the effort force (Newton)
Copyright © 2010 Ryan P. Murphy
 To find MA
 Divide resistance force (usually weight in g)
by the effort force (Newton)
Copyright © 2010 Ryan P. Murphy
 To find MA
 Divide resistance force (usually weight in g)
by the effort force (Newton)
Copyright © 2010 Ryan P. Murphy
 To find MA
 Divide resistance force (usually weight in g)
by the effort force (Newton)
Copyright © 2010 Ryan P. Murphy
...
 To find MA
 Divide resistance force (usually weight in g)
by the effort force (Newton)
Copyright © 2010 Ryan P. Murphy
...
• Find the MA of the following.
• The work input was 2, and the output was 18.
• Find the MA of the following.
• The work input was 2, and the output was 18.
• Find the MA of the following.
• The work input was 2, and the output was 18.
FI
FO
• Find the MA of the following.
• The work input was 2, and the output was 18.
FI
FO
• Find the MA of the following.
• The work input was 2, and the output was 18.
FI
FO
• Find the MA of the following.
• The work input was 2, and the output was 18.
FI
FO
2
18
• Find the MA of the following.
• The work input was 2, and the output was 18.
FI
FO
2
18
= 9 MA
• Find the MA of the following.
• The work input was 2, and the output was 18.
FI
FO
2
18
= 9 MA
Mechanical Advantage: Lea...
12 N
6 N
12 N
6 NFO
FI
12 N
6 NFO
FI
12 N
6 NFO
FI
12 N
6 NFO
FI 6N
12N
12 N
6 NFO
FI 6N
12N
= 12 MA
40 N
20 N
40 N
20 N
FO
FI
40 N
20 N
FO
FI
40 N
20 N
FO
FI 20N
40N
40 N
20 N
FO
FI 20N
40N
= 2 MA
40 N
20 N
FO
FI 20N
40N
= 2 MA
90 N
45 N
90 N
45 N
FO
FI
90 N
45 N
FO
FI 45N
90N
90 N
45 N
FO
FI 45N
90N
= 2 MA
• Law Conservation of Energy
• Law Conservation of Energy
– Energy cannot be created or destroyed.
• Law Conservation of Energy
– Energy cannot be created or destroyed.
– Energy can be transferred.
• Law Conservation of Energy
– Energy cannot be created or destroyed.
– Energy can be transferred.
• Law Conservation of Energy
– Energy cannot be created or destroyed.
– Energy can be transferred.
• Video Links! Mechanical Advantage, Khan
Academy, Optional (Advanced) (I,II,III)
– http://www.khanacademy.org/science/phy...
 Simple machines: Types of machines that
do work with one movement.
Copyright © 2010 Ryan P. Murphy
 Simple machines: Types of machines that
do work with one movement.
Copyright © 2010 Ryan P. Murphy
 Simple machines: Types of machines that
do work with one movement.
Copyright © 2010 Ryan P. Murphy
 Simple machines: Types of machines that
do work with one movement.
Copyright © 2010 Ryan P. Murphy
 Simple machines: Types of machines that
do work with one movement.
Copyright © 2010 Ryan P. Murphy
 Simple machines: Types of machines that
do work with one movement.
Copyright © 2010 Ryan P. Murphy
 Simple machines: Types of machines that
do work with one movement.
Copyright © 2010 Ryan P. Murphy
 Simple machines: Types of machines that
do work with one movement.
Copyright © 2010 Ryan P. Murphy
 Simple machines: Types of machines that
do work with one movement.
Copyright © 2010 Ryan P. Murphy
 Simple machines: Types of machines that
do work with one movement.
Copyright © 2010 Ryan P. Murphy
• Simple Machines Available Sheet: Pulleys
 Pulley
 Uses grooved wheels and a rope to raise,
lower or move a load.
Copyright © 2010 Ryan P. Murphy
 Pulley
 Uses grooved wheels and a rope to raise,
lower or move a load.
Copyright © 2010 Ryan P. Murphy
 A pulley makes work seem easier
Copyright © 2010 Ryan P. Murphy
 A pulley makes work seem easier
Copyright © 2010 Ryan P. Murphy
 A pulley makes work seem easier
 Changes the direction of motion to work with
gravity.
Copyright © 2010 Ryan P. Murphy
 A pulley makes work seem easier
 Changes the direction of motion to work with
gravity. Instead of lifting up, you can p...
 A pulley makes work seem easier
 Changes the direction of motion to work with
gravity. Instead of lifting up, you can p...
 The more pulleys that are used, the more
the MA (Mechanical Advantage).
Copyright © 2010 Ryan P. Murphy
 The more pulleys that are used, the more
the MA (Mechanical Advantage).
Copyright © 2010 Ryan P. Murphy
 MA = The number of ropes that support
the pulley. The end of the rope doesn’t
count.
 What is the MA of this pulley sys...
• MA = The number of ropes that support
the pulley. The end of the rope doesn’t
count.
– What is the MA of this pulley sys...
• MA = The number of ropes that support
the pulley. The end of the rope doesn’t
count. MA =2
– What is the MA of this pull...
• MA = The number of ropes that support
the pulley. The end of the rope doesn’t
count. MA =2
– What is the MA of this pull...
• MA = The number of ropes that support
the pulley. The end of the rope doesn’t
count. MA =2
– What is the MA of this pull...
• MA = The number of ropes that support
the pulley. The end of the rope doesn’t
count. MA =2
– What is the MA of this pull...
• MA = The number of ropes that support
the pulley. The end of the rope doesn’t
count. MA =2
– What is the MA of this pull...
• MA = The number of ropes that support
the pulley. The end of the rope doesn’t
count. MA =2
– What is the MA of this pull...
• MA = The number of ropes that support
the pulley. The end of the rope doesn’t
count. MA =2
– What is the MA of this pull...
• What is the MA of this pulley system?
MA=2
Copyright © 2010 Ryan P. Murphy
• Answer, the MA is 4.
Copyright © 2010 Ryan P. Murphy
• Answer, the MA is 4.
Copyright © 2010 Ryan P. Murphy
• Answer, the MA is 4.
Copyright © 2010 Ryan P. Murphy
FI
FO
• Answer, the MA is 4.
Copyright © 2010 Ryan P. Murphy
FI
FO
FI
FO
• Answer, the MA is 4.
Copyright © 2010 Ryan P. Murphy
FI
FO
FI
FO
• Answer, the MA is 4.
Copyright © 2010 Ryan P. Murphy
FI
FO
FI
FO 100
25
• Answer, the MA is 4.
Copyright © 2010 Ryan P. Murphy
FI
FO
FI
FO 100
25
= 4 MA
• What is the MA?
• What is the MA?
• What is the MA?
• What is the MA?
• What is the MA?
• What is the MA?
• What is the MA?
• What is the MA?
• What is the MA?
• Pulley Simulator: (Optional)
– http://www.compassproject.net/sims/pulley.html
 Three types of pulleys
 -
 -
 -
Copyright © 2010 Ryan P. Murphy
 Fixed pulley
 No MA
Copyright © 2010 Ryan P. Murphy
 Fixed pulley
 No MA
Copyright © 2010 Ryan P. Murphy
 Movable Pulley (MA of 2)
Copyright © 2010 Ryan P. Murphy
 Movable Pulley (MA of 2)
Copyright © 2010 Ryan P. Murphy
 Combined Pulley / Block and tackle
Copyright © 2010 Ryan P. Murphy
• Rock climbing uses pulleys.
Copyright © 2010 Ryan P. Murphy
• Rock climbing uses pulleys.
Copyright © 2010 Ryan P. Murphy
• Rock climbing uses pulleys.
Copyright © 2010 Ryan P. Murphy
• Sailing uses pulleys to ease difficult jobs.
Copyright © 2010 Ryan P. Murphy
Pulleys
• The chain on your bicycle is a pulley.
• Quiz Wiz 1-10 Fixed Pulley, Moveable
Pulley, Block and Tackle/Combined Pulley
Copyright © 2010 Ryan P. Murphy
• * Bonus: Name this family that used
simple machines to create a tree house?
• Answers! Quiz Wiz 1-10 Fixed Pulley,
Moveable Pulley, Block and
Tackle/Combined Pulley
Copyright © 2010 Ryan P. Murphy
• * Bonus: Name this family that used
simple machines to create a tree house?
• * Bonus: Name this family that used
simple machines to create a tree house?
• Activity! Using the three types of Pulleys
Copyright © 2010 Ryan P. Murphy
• Activity! Using the three types of Pulleys
Copyright © 2010 Ryan P. Murphy
I wonder what
the MA of this
pulley system is?
• Activity! Using the three types of Pulleys
Copyright © 2010 Ryan P. Murphy
I wonder what
the MA of this
pulley system is?
• Activity! Using the three types of Pulleys
Copyright © 2010 Ryan P. Murphy
I wonder what
the MA of this
pulley system is?
Top
Pulley
Bottom
Pulley
Top
Pulley
Bottom
Pulley
Top
Pulley
Bottom
Pulley
Top
Pulley
Bottom
Pulley
Top
Pulley
Bottom
Pulley
• Simple Machines Available Sheet.
Please create this spreadsheet in your
journal.
Weight (g) newtons
No Pulley ____ grams
Fixed Pulley ____ grams
Combined
P...
• Please use the materials to do the
following.
–Measure the newtons required with a
Spring Scale to lift the ____ grams o...
• Please use the materials to do the
following.
–Measure the newtons required with a
Spring Scale to lift the ____ grams o...
• Please use the materials to do the following.
– Record the newtons required with a Spring
Scale to lift the ____ grams o...
• Fixed Pulley System Construction
• Fixed Pulley System Construction
• Fixed Pulley System Construction
• Fixed Pulley System Construction
• Fixed Pulley System Construction
• Fixed Pulley System Construction
• Fixed Pulley System Construction
• Please use the materials to do the
following.
–Record the newtons with a combined
pulley to lift the weight?
Spring Scal...
• Two Pulley System Construction
• Two Pulley System Construction
• Two Pulley System Construction
• Two Pulley System Construction
• Two Pulley System Construction
• Two Pulley System Construction
• Two Pulley System Construction
• Two Pulley System Construction
• Please use the materials to do the following.
– Record newtons with a combined pulley (4) to
lift the ____ grams of weig...
• 4 Pulley System Construction
• 4 Pulley System Construction
• 4 Pulley System Construction
Two wheels /
Pulley
• 4 Pulley System Construction
Two wheels /
Pulley
• 4 Pulley System Construction
• 4 Pulley System Construction
• If you don’t have double pulleys, you can
still use 4 single pulley’s like so.
Copyright © 2010 Ryan P. Murphy
• Create a moveable pulley to lower the ___
gram weight into the bucket without
touching it.
Copyright © 2010 Ryan P. Murp...
• Questions?
– What was the advantage in newtons to use a
fixed pulley rather than no pulley at all?
– What was the advant...
• Questions?
– What was the advantage in newtons to use a
fixed pulley rather than no pulley at all?
– What was the advant...
• Questions?
– What was the advantage in newtons to use a
fixed pulley rather than no pulley at all?
– What was the advant...
• Questions?
– What was the advantage in newtons to use a
fixed pulley rather than no pulley at all?
– What was the advant...
Weight (g) Newton
No Pulley ___ grams 5 newtons
Fixed Pulley ___ grams 5 newtons?
Combined
Pulley 2
___ grams 3 newtons?
C...
• Questions?
– What was the advantage in newtons to use a
fixed pulley rather than no pulley at all?
Copyright © 2010 Ryan...
• Questions?
– What was the advantage in newtons to use a
fixed pulley rather than no pulley at all?
– There was no Mechan...
• Questions?
– What was the advantage in newtons to use a
combined pulley over a fixed pulley?
Copyright © 2010 Ryan P. Mu...
• Questions?
– What was the advantage in newtons to use a
combined pulley over a fixed pulley?
– The combined pulley requi...
• Questions?
– What was the advantage in newtons to use a
combined pulley (4) over a combined pulley
(2)?
Copyright © 2010...
• Questions?
– What was the advantage in newtons to use a
combined pulley (4) over a combined pulley
(2)?
– The (MA) was 4...
Pulleys. Learn more at…
http://www.swe.org/iac/lp/pulley_03.html
• Questions?
– Did a moveable pulley allow you to move the
load with minimal effort?
Copyright © 2010 Ryan P. Murphy
• Questions?
– Did a moveable pulley allow you to move the
load with minimal effort?
– The pulley moved along the rope ver...
• Simple Machines Available Sheet: Levers
 Lever
-
 Lever
A stiff bar that rests on a support called
a fulcrum which lifts or moves loads.
 MA = length of effort arm ÷ length of
resistance arm.
Copyright © 2010 Ryan P. Murphy
 MA = length of effort arm ÷ length of
resistance arm.
Copyright © 2010 Ryan P. Murphy
 MA = length of effort arm ÷ length of
resistance arm.
Copyright © 2010 Ryan P. Murphy
 MA = length of effort arm ÷ length of
resistance arm.
Copyright © 2010 Ryan P. Murphy
Or…
 MA = length of effort arm ÷ length of
resistance arm.
Copyright © 2010 Ryan P. Murphy
120 N
FI
FO
360 N
 MA = length of effort arm ÷ length of
resistance arm.
Copyright © 2010 Ryan P. Murphy
120 N
FI
FO
360 N=
FO
FI
 MA = length of effort arm ÷ length of
resistance arm.
Copyright © 2010 Ryan P. Murphy
120 N
FI
FO
360 N=
FO 360 N
FI 120...
 MA = length of effort arm ÷ length of
resistance arm.
Copyright © 2010 Ryan P. Murphy
120 N
FI
FO
360 N=3 MA
FO 360 N
FI...
• What is the MA of this lever?
– MA = length of effort arm ÷ length of resistance arm.
Copyright © 2010 Ryan P. Murphy
6 ...
• What is the MA of this lever?
– MA = length of effort arm ÷ length of resistance arm.
Copyright © 2010 Ryan P. Murphy
6 ...
• What is the MA of this lever?
– MA = length of effort arm ÷ length of resistance arm.
Copyright © 2010 Ryan P. Murphy
6 ...
• What is the MA of this lever?
– MA = length of effort arm ÷ length of resistance arm.
Copyright © 2010 Ryan P. Murphy
6 ...
• What is the MA of this lever?
– MA = length of effort arm ÷ length of resistance arm.
Copyright © 2010 Ryan P. Murphy
12...
• What is the MA of this lever?
– MA = length of effort arm ÷ length of resistance arm.
Copyright © 2010 Ryan P. Murphy
12...
• What is the MA of this lever?
– MA = length of effort arm ÷ length of resistance arm.
Copyright © 2010 Ryan P. Murphy
12...
• What is the MA of this lever?
– MA = length of effort arm ÷ length of resistance arm.
Copyright © 2010 Ryan P. Murphy
12...
• What is the MA of this lever?
– MA = length of effort arm ÷ length of resistance arm.
Copyright © 2010 Ryan P. Murphy
12...
• What is the MA of this lever?
– MA = length of effort arm ÷ length of resistance arm.
Copyright © 2010 Ryan P. Murphy
90...
• What is the MA of this lever?
– MA = length of effort arm ÷ length of resistance arm.
Copyright © 2010 Ryan P. Murphy
FO...
• What is the MA of this lever?
– MA = length of effort arm ÷ length of resistance arm.
Copyright © 2010 Ryan P. Murphy
FO...
• What is the MA of this lever?
– MA = length of effort arm ÷ length of resistance arm.
Copyright © 2010 Ryan P. Murphy
FO...
• What is the MA of this lever?
– MA = length of effort arm ÷ length of resistance arm.
Copyright © 2010 Ryan P. Murphy
FO...
• What is the MA of this lever?
– MA = length of effort arm ÷ length of resistance arm.
Copyright © 2010 Ryan P. Murphy
=3...
• Video Link! Levers and skateboarding.
– http://www.youtube.com/watch?v=72ZNEactb-k
 The 3 types of levers
 -
 -
 -
Copyright © 2010 Ryan P. Murphy
 The 3 types of levers
 -
 -
 -
Copyright © 2010 Ryan P. Murphy
 The 3 types of levers
 -
 -
 -
Copyright © 2010 Ryan P. Murphy
 The 3 types of levers
 -
 -
 -
Copyright © 2010 Ryan P. Murphy
 The 3 types of levers
 -
 -
 -
Copyright © 2010 Ryan P. Murphy
• Which is a first, second, and third class
lever.?
– Please put your finger in the air when the square
lights up.
• Which is a first, second, and third class
lever.?
– Please put your finger in the air when the square
lights up.
• Which is a first, second, and third class
lever.?
– Please put your finger in the air when the square
lights up.
• Which is a first, second, and third class
lever.?
– Please put your finger in the air when the square
lights up.
• Which is a first, second, and third class
lever.?
– Please put your finger in the air when the square
lights up.
• Which is a first, second, and third class
lever.?
– Please put your finger in the air when the square
lights up.
• Which is a first, second, and third class
lever.?
– Please put your finger in the air when the square
lights up.
 First Class Lever
Copyright © 2010 Ryan P. Murphy
• The law of equilibrium is: The effort multiplied by its
distance from the fulcrum equals the load multiplied by
its dist...
• The law of equilibrium is: The effort multiplied by its
distance from the fulcrum equals the load multiplied by
its dist...
• The law of equilibrium is: The effort multiplied by its
distance from the fulcrum equals the load multiplied by
its dist...
• The law of equilibrium is: The effort multiplied by its
distance from the fulcrum equals the load multiplied by
its dist...
• Activity! Sending a stuffed toy flying.
– Create a first class lever and send and toy
into the air by jumping on the eff...
• Activity! Sending a stuffed toy flying.
– Create a first class lever and send and toy
into the air by jumping on the eff...
• Activity! Sending a stuffed toy flying.
– Create a first class lever and send and toy
into the air by jumping on the eff...
• Activity! Sending a stuffed toy flying.
– Create a first class lever and send and toy
into the air by jumping on the eff...
• Activity! Sending a stuffed toy flying.
– Create a first class lever and send and toy
into the air by jumping on the eff...
• Activity! Sending a stuffed toy flying.
– Change the fulcrum, Will this change how
high the toy will travel.
• Activity! Sending a stuffed toy flying.
– Change the fulcrum, Will this change how
high the toy will travel.
• Activity! Sending a stuffed toy flying.
– Change the fulcrum, Will this change how
high the toy will travel.
• Activity! Sending a stuffed toy flying.
– Change the fulcrum, Will this change how
high the toy will travel.
• Activity! Sending a stuffed toy flying.
– Change the fulcrum, Will this change how
high the toy will travel.
• Activity! Sending a stuffed toy flying.
– Change the fulcrum, Will this change how
high the toy will travel.
• Activity! Sending a stuffed toy flying.
– Change the fulcrum, Will this change how
high the toy will travel.
• Activity! Sending a stuffed toy flying.
– Change the fulcrum, Will this change how
high the toy will travel.
• Activity! Sending a stuffed toy flying.
– Change the fulcrum, Will this change how
high the toy will travel.
• Activity! Sending a stuffed toy flying.
– Change the fulcrum, Will this change how
high the toy will travel.
• Activity! Sending a stuffed toy flying.
– Change the fulcrum, Will this change how
high the toy will travel.
• Activity! Sending a stuffed toy flying.
– Change the fulcrum, Will this change how
high the toy will travel.
• Simple Machines Available Sheet: Levers
• Activity! Levers – Please record the
spreadsheet below in your journal.
Mechanical Advantage # of newtons to lift
lever
...
• Please set up your first class lever system as
follows.
– Use the centimeters on the ruler to set up lever
and determine...
• Simulated data / Answers
Mechanical Advantage # of newtons to lift
lever
Just the weight
(_____ grams)
No MA 3 Results w...
Mechanical Advantage # of newtons to lift
lever
Just the weight
(_____ grams)
No MA 3 Results will vary due
to spring scal...
Mechanical Advantage # of newtons to lift
lever
Just the weight
(_____ grams)
No MA 3 Results will vary due
to spring scal...
• Simple Machines Available Sheet: Levers
• Questions / Follow-up (Use data in MA or
in newtons)
– Which fulcrum position (Crayola marker) gave
you the best MA or l...
• Questions / Follow-up (Use data in MA or
in newtons)
– Which fulcrum position (Crayola marker) gave
you the best MA or l...
• Questions / Follow-up (Use data in MA or
in newtons)
– Which fulcrum position (Crayola marker) gave
you the best MA or l...
• Questions / Follow-up (Use data in MA or
in newtons)
– Which fulcrum position (Crayola marker) gave
you the best MA or l...
• Questions / Follow-up (Use data in MA or in
newtons)
– Which fulcrum position (Crayola marker) gave
you the best MA or l...
• Questions / Follow-up (Use data in MA or in
newtons)
– Which fulcrum position (Crayola marker) gave
you the best MA or l...
• Questions / Follow-up (Use data in MA or in
newtons)
– Which fulcrum position (Crayola marker) gave
you the best MA or l...
• Questions / Follow-up (Use data in MA or in
newtons)
– Which fulcrum position (Crayola marker) gave
you the best MA or l...
• Questions / Follow-up (Use data in MA or
in newtons)
– Which fulcrum position (marker) gave you the
least MA or negative...
• Questions / Follow-up (Use data in MA or
in newtons)
– Which fulcrum position (marker) gave you the
least MA or negative...
• Questions / Follow-up (Use data in MA or
in newtons)
– Which fulcrum position (marker) gave you the
least MA or negative...
• Questions / Follow-up (Use data in MA or
in newtons)
– Which fulcrum position (marker) gave you the
least MA or negative...
• Questions / Follow-up (Use data in MA or
in newtons)
– How does changing the fulcrums location
effect the lever?
Copyrig...
• Questions / Follow-up (Use data in MA or
in newtons)
– How does changing the fulcrums location
effect the lever?
– Answe...
• Questions / Follow-up (Use data in MA or
in newtons)
– How does changing the fulcrums location
effect the lever?
– Answe...
• Questions / Follow-up (Use data in MA or
in newtons)
– How does changing the fulcrums location
effect the lever?
– Answe...
 Second Class Lever
Copyright © 2010 Ryan P. Murphy
• Activity! Charades, what is the common
item acted out.
–Hint, It’s a second class lever.
Copyright © 2010 Ryan P. Murphy
• Activity! Charades, what is the common
item acted out.
–Hint, It’s a second class lever.
Copyright © 2010 Ryan P. Murphy
• Answer, A wheel barrel.
Copyright © 2010 Ryan P. Murphy
• Second Class Lever
Copyright © 2010 Ryan P. Murphy
• Simple Machines Available Sheet: Levers
• Please use your materials from the first
class lever to construct a second class
lever.
– Feel the difference when you a...
• Please use your materials from the first
class lever to construct a second class
lever.
– Feel the difference when you a...
• Please use your materials from the first
class lever to construct a second class
lever.
– Feel the difference when you a...
• Please use your materials from the first
class lever to construct a second class
lever.
– Feel the difference when you a...
• Please use your materials from the first
class lever to construct a second class
lever.
– Feel the difference when you a...
• Please use your materials from the first
class lever to construct a second class
lever.
– Feel the difference when you a...
• Please use your materials from the first
class lever to construct a second class
lever.
– Feel the difference when you a...
• Please use your materials from the first
class lever to construct a second class
lever.
– Feel the difference when you a...
• Please use your materials from the first
class lever to construct a second class
lever.
– Feel the difference when you a...
• Activity! Second Class Lever.
– Set-up your own spreadsheet and conduct
your own investigation (collecting data) about
s...
• Activity! Second Class Lever.
– Set-up your own spreadsheet and conduct
your own investigation (collecting data) about
s...
• Activity! Second Class Lever.
– Use the computers to set-up your
spreadsheet and graph.
Be prepared
to report
your findi...
• Activity! Second Class Lever.
– Answers (General): The (MA) increases as
the load is moved closer to the fulcrum /
resis...
 Third Class Lever.
 Has Mechanical Disadvantage.
 Requires more force to lift the load.
Copyright © 2010 Ryan P. Murphy
 Third Class Lever.
 Has Mechanical Disadvantage.
 Requires more force to lift the load.
Copyright © 2010 Ryan P. Murphy
 Third Class Lever.
 Has Mechanical Disadvantage.
 Requires more force to lift the load.
Copyright © 2010 Ryan P. Murphy
Fulcrum
Load
Fulcrum
Load
Fulcrum
Effort
• Which is a first, second, and third class
lever.?
– Please put your finger in the air when the square
lights up.
• Which is a first, second, and third class
lever.?
– Please put your finger in the air when the square
lights up.
• Which is a first, second, and third class
lever.?
– Please put your finger in the air when the square
lights up.
• Which is a first, second, and third class
lever.?
– Please put your finger in the air when the square
lights up.
• Which is a first, second, and third class
lever.?
– Please put your finger in the air when the square
lights up.
• Which is a first, second, and third class
lever.?
– Please put your finger in the air when the square
lights up.
• Which is a first, second, and third class
lever.?
– Please put your finger in the air when the square
lights up.
• How many levers can you point out?
• How many levers can you point out?
• How many levers can you point out?
Levers: Learn more at…
http://www.technologys
tudent.com/forcmom/le
ver1.htm
• Video! (Optional) – 6 minutes.
– Cirque du Soleil and the Lever.
– What type of lever is being used?
– How is the lever ...
 Wedge: An object with at least one slanting
side ending in a sharp edge, which cuts
materials apart.
Copyright © 2010 Ry...
 The mechanical advantage of a wedge can be
found by dividing the length of the slope (S) by
the thickness (T) of the big...
 The mechanical advantage of a wedge can be
found by dividing the length of the slope (S) by
the thickness (T) of the big...
• Answer! 50/10 = Mechanical Advantage 5
50 cm
10 cm
Copyright © 2010 Ryan P. Murphy
• What is the MA of this wedge?
20 cm
5 cm
• What is the MA of this wedge?
20 cm
5 cm
20/5 =
• What is the MA of this wedge?
20 cm
5 cm
20/5 = MA 4
• Which wedge below has the greater MA
Mechanical Advantage?
Copyright © 2010 Ryan P. Murphy
• Which wedge below has the greater MA
Mechanical Advantage?
Copyright © 2010 Ryan P. Murphy
• Which wedge below has the greater MA
Mechanical Advantage?
Copyright © 2010 Ryan P. Murphy
• Which wedge below has the greater MA
Mechanical Advantage?
Copyright © 2010 Ryan P. Murphy
• Simple Machines Available Sheet: Levers
• Activity! (Optional) Mechanical Advantage of
a Wedge.
– Please trace the wooden blocks and calculate
the Mechanical Adva...
• Activity! (Optional) Mechanical Advantage of
a Wedge.
– Please trace the wooden blocks and calculate
the Mechanical Adva...
• Activity!
– On the next slide, your table group must find
the MA of 4 different wedges in 60 seconds.
– To succeed your ...
Simulated wooden blocks.
3
8
4
20
10
4
6
12
Simulated wooden blocks.
3
8
4
20
10
4
6
12
Simulated wooden blocks.
3
8
4
20
10
4
6
12
MA=2
Simulated wooden blocks.
3
8
4
20
10
4
6
12
MA=2
Simulated wooden blocks.
3
8
4
20
10
4
6
12
MA=2
MA = 6.66
Simulated wooden blocks.
3
8
4
20
10
4
6
12
MA=2
MA = 6.66
Simulated wooden blocks.
3
8
4
20
10
4
6
12
MA=2
MA = 6.66
MA = 2.5
Simulated wooden blocks.
3
8
4
20
10
4
6
12
MA=2
MA = 6.66
MA = 2.5
Simulated wooden blocks.
3
8
4
20
10
4
6
12
MA=2
MA = 6.66
MA = 2.5
MA = 2
• What is our next simple machine?
• What is our next simple machine?
Axle
Wheel
 Wheel and Axle: A wheel with a rod,
called an axle, through its center lifts or
moves a load.
Copyright © 2010 Ryan P. M...
 Wheel and Axle: A wheel with a rod,
called an axle, through its center lifts or
moves a load.
Copyright © 2010 Ryan P. M...
 Wheel and Axle: A wheel with a rod,
called an axle, through its center lifts or
moves a load.
Copyright © 2010 Ryan P. M...
 The mechanical advantage of a wheel and axle is
the ratio of the radius of the wheel divided by
the radius of the axle.
...
 The mechanical advantage of a wheel and axle is
the ratio of the radius of the wheel divided by
the radius of the axle.
...
 The mechanical advantage of a wheel and axle is
the ratio of the radius of the wheel divided by
the radius of the axle.
...
 The mechanical advantage of a wheel and axle is
the ratio of the radius of the wheel divided by
the radius of the axle.
...
 The mechanical advantage of a wheel and axle is
the ratio of the radius of the wheel divided by
the radius of the axle.
...
 The mechanical advantage of a wheel and axle is
the ratio of the radius of the wheel divided by
the radius of the axle.
...
 The mechanical advantage of a wheel and axle is
the ratio of the radius of the wheel divided by
the radius of the axle.
...
 The mechanical advantage of a wheel and axle is
the ratio of the radius of the wheel divided by
the radius of the axle.
...
 The mechanical advantage of a wheel and axle is
the ratio of the radius of the wheel divided by
the radius of the axle.
...
 Radius: A straight line from a circles
center to its perimeter.
• Diameter: The length of a straight line
passing through the center of a circle and
connecting two points on the
circumfe...
• Diameter: The length of a straight line
passing through the center of a circle and
connecting two points on the
circumfe...
• Diameter: The length of a straight line
passing through the center of a circle and
connecting two points on the
circumfe...
• What is the MA of this wheel below?
r=60 cm
r=3 cm
Copyright © 2010 Ryan P. Murphy
• MA = 20
r=60 cm
r=3 cm
Copyright © 2010 Ryan P. Murphy
1.25 m
.5 m
“The MA is not
2.5, it’s 5.5”
1.25 m
.5 m
“Dude, She’s
right, the MA
is 2.5”
1.25 m
.5 m
“Yah, but…
Arggh”
• Note how this mousetrap car is using a
wheel that would have a high mechanical
advantage.
15 cm .5 cm
• Note how this mousetrap car is using a
wheel that would have a high mechanical
advantage.
15 cm .5 cm
15/.5 =
• Note how this mousetrap car is using a
wheel that would have a high mechanical
advantage.
15 cm .5 cm
15/.5 = MA 30
Wheel and Axle, Mechanical Advantage. Learn more at…
http://en.wikipedia.org/wiki/Wheel_and_axle
• Activity! Trace an old compact disc into your
science journal and pretend it is a wheel and
axle. (Crayola Marker is Axl...
• Activity! Trace an old compact disc into your
science journal and pretend it is a wheel and
axle. (Crayola Marker is Axl...
• Activity! Trace an old compact disc into your
science journal and pretend it is a wheel and
axle. (Crayola Marker is Axl...
• Activity! Trace an old compact disc into your
science journal and pretend it is a wheel and
axle. (Crayola Marker is Axl...
• Activity! Trace an old compact disc into your
science journal and pretend it is a wheel and
axle. (Crayola Marker is Axl...
• Activity! Trace an old compact disc into your
science journal and pretend it is a wheel and
axle. (Crayola Marker is Axl...
• Activity! Trace an old compact disc into your
science journal and pretend it is a wheel and
axle. (Crayola Marker is Axl...
• Activity! Trace an old compact disc into your
science journal and pretend it is a wheel and
axle. (Crayola Marker is Axl...
• Simple Machines Available Sheet:
– Wheel and Axle.
• Wheel and Axle.
– Find the numbers of newtons to drag your
journal across the table with some weights on it.
– Next, pla...
 An Inclined plane: A slanting surface
connecting a lower level to a higher level.
Copyright © 2010 Ryan P. Murphy
• Where are the inclined planes?
Copyright © 2010 Ryan P. Murphy
• Answer!
Copyright © 2010 Ryan P. Murphy
• Field Trip! Let’s visit the inclined plane.
Copyright © 2010 Ryan P. Murphy
• Activity! Finding the Mechanical
Advantage (MA) of the Handicap ramp
(Inclined Plane) at the school.
• Law Conservation of energy: energy
cannot be created or destroyed.
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
• Law Conservation of energy: energy
cannot be created or destroyed.
– Simple machines generally require more work
/ energ...
Copyright © 2010 Ryan P. Murphy
Copyright © 2010 Ryan P. Murphy
Copyright © 2010 Ryan P. Murphy
Copyright © 2010 Ryan P. Murphy
 MA for an inclined plane is the length of
the slope divided by the height (Rise).
Copyright © 2010 Ryan P. Murphy
 MA for an inclined plane is the length of
the slope divided by the height (Rise).
Copyright © 2010 Ryan P. Murphy
 MA for an inclined plane is the length of
the slope divided by the height (Rise).
Copyright © 2010 Ryan P. Murphy
 MA for an inclined plane is the length of
the slope divided by the height (Rise).
Copyright © 2010 Ryan P. Murphy
100m
5...
 MA for an inclined plane is the length of
the slope divided by the height (Rise).
Copyright © 2010 Ryan P. Murphy
100m
5...
 MA for an inclined plane is the length of
the slope divided by the height (Rise).
 What’s the MA of this inclined plane...
 MA for an inclined plane is the length of
the slope divided by the height (Rise).
 What’s the MA of this inclined plane...
• Inclined plane is a wedge
• Activity Simulator: Inclined Plane
• http://phet.colorado.edu/en/simulation/the-
ramp
• Simple Machines Available Sheet:
– Inclined Plane
• Set-up of activity.
– The number of textbook will change. The
independent variable.
– The dependent variable is the # of...
• Activity! How does an inclined plane make
work easier.
– Use the spring scale and with attached weight to
determine the ...
Flat ramp (no textbooks) newtons ___.5___
Low ramp (3 textbooks) newtons ___1.0___
Medium ramp (6 textbooks) newtons ___1....
• Questions / Follow up to Inclined Plane.
– Using data (Netwons) in your response, How did the
various inclined planes ef...
• Questions / Follow up to Inclined Plane.
– Using data (newtons) in your response, How did the
various inclined planes ef...
• Questions / Follow up to Inclined Plane.
– Using data (newtons) in your response, How did the
various inclined planes ef...
• Determining the MA for an inclined is very
important when building roadways.
– Too steep and some cars and trucks may no...
• Video Link! (Optional) Alpe d’huez
(Inclined Plane) Tour De France
– http://www.youtube.com/watch?v=F94TCxLY
Zew
 Screw: An inclined plane wrapped around a
pole which holds things together or lifts
materials.
Copyright © 2010 Ryan P. ...
 Screw: An inclined plane wrapped around a
pole which holds things together or lifts
materials.
Copyright © 2010 Ryan P. ...
 Screw: An inclined plane wrapped around a
pole which holds things together or lifts
materials.
Copyright © 2010 Ryan P. ...
 The mechanical advantage of a screw can be
found by dividing the circumference of the
screw by the pitch of the screw.
C...
• The gentler the pitch (i.e. finer the thread), the
easier it moves, but you have to make a lot of
turns.
– Which of the ...
• The gentler the pitch (i.e. finer the thread), the
easier it moves, but you have to make a lot of
turns.
– Which of the ...
• The gentler the pitch (i.e. finer the thread), the
easier it moves, but you have to make a lot of
turns.
– Which of the ...
 The circumference of a circle is the
distance around the circle. It is the circle's
perimeter. The formula for circumfer...
 The circumference of a circle is the
distance around the circle. It is the circle's
perimeter. The formula for circumfer...
 The circumference of a circle is the
distance around the circle. It is the circle's
perimeter. The formula for circumfer...
 The circumference of a circle is the
distance around the circle. It is the circle's
perimeter. The formula for circumfer...
 The circumference of a circle is the
distance around the circle. It is the circle's
perimeter. The formula for circumfer...
 The circumference of a circle is the
distance around the circle. It is the circle's
perimeter. The formula for circumfer...
 The circumference of a circle is the
distance around the circle. It is the circle's
perimeter. The formula for circumfer...
• Simple Machines Available Sheet: Screw
• What is the MA of the screw below?
• Divide circumference by the pitch to get MA.
Copyright © 2010 Ryan P. Murphy
• What is the MA of the screw below?
• Divide circumference by the pitch to get MA.
Copyright © 2010 Ryan P. Murphy
.5 cm
...
• What is the MA of the screw below?
• Divide circumference by the pitch to get MA.
Copyright © 2010 Ryan P. Murphy
.5 cm
...
• 2 = 6.28
Copyright © 2010 Ryan P. Murphy
2 cm
.5 cm
• 2 = 6.28
• 6.28 / .5
Copyright © 2010 Ryan P. Murphy
2 cm
.5 cm
• 2 = 6.28
• 6.28 / .5 Mechanical Advantage = 12.56
Copyright © 2010 Ryan P. Murphy
2 cm
.5 cm
• What is the mechanical advantage of this
screw?
Copyright © 2010 Ryan P. Murphy
4 mm
6 mm
• What is the mechanical advantage of this
screw?
Copyright © 2010 Ryan P. Murphy
4 mm
6 mm
• 6 = =
Copyright © 2010 Ryan P. Murphy
4 mm
6 mm
• 6 = = 18.84
Copyright © 2010 Ryan P. Murphy
4 mm
6 mm
• 6 = = 18.84
• 18.84 / 4
Copyright © 2010 Ryan P. Murphy
4 mm
6 mm
• 6 = = 18.84
• 18.84 / 4 Mechanical Advantage = 4.71
Copyright © 2010 Ryan P. Murphy
4 mm
6 mm
• What is the mechanical advantage of this giant
screw? Measure with a meter stick (centimeters)
Copyright © 2010 Ryan P. ...
• Archimedes Screw: A screw contained in a
cylinder that when turned can easily raise
water.
• Pascal's Law: If you apply pressure to fluids that
are confined (or can’t flow anywhere), the fluids will
then transmit ...
• Pascal's Law: If you apply pressure to fluids that
are confined (or can’t flow anywhere), the fluids will
then transmit ...
• Pascal's Law: If you apply pressure to fluids that
are confined (or can’t flow anywhere), the fluids will
then transmit ...
• Hydraulics - The branch of applied science that
deals with fluids in motion.
• Hydraulics - The branch of applied science that
deals with fluids in motion.
• Hydraulic system: Force applied at one end
is transmitted to the other using a
incompressible fluid.
• Hydraulic system: Force applied at one end
is transmitted to the other using a
incompressible fluid.
– The fluid is almo...
How Hydraulics Work. Learn more at…
http://science.howstuffworks.com/transport/engines-
equipment/hydraulic.htm
• Activity – Pascal’s Law and Hydraulics.
• Activity! Making a hydraulic syringe drive.
Copyright © 2010 Ryan P. Murphy
• Activity! Making a hydraulic syringe drive.
– Push syringe to bottom of tube on one side.
Copyright © 2010 Ryan P. Murphy
• Activity! Making a hydraulic syringe drive.
– Push syringe to bottom of tube on one side.
– Dip end of syringe in water ...
• Activity! Making a hydraulic syringe drive.
– Push syringe to bottom of tube on one side.
– Dip end of syringe in water ...
• Activity! Making a hydraulic syringe drive.
– Push syringe to bottom of tube on one side.
– Dip end of syringe in water ...
• Activity! Making a hydraulic syringe drive.
– Push syringe to bottom of tube on one side.
– Dip end of syringe in water ...
• Activity! Making a hydraulic syringe drive.
– Push syringe to bottom of tube on one side.
– Dip end of syringe in water ...
• Questions to making a hydraulic syringe drive.
– Draw / Sketch the hydraulic drive you created.
– How is Pascal’s Law re...
• Questions to making a hydraulic syringe drive.
– Draw / Sketch the hydraulic drive you created.
– How is Pascal’s Law re...
• Questions to making a hydraulic syringe drive.
– Draw / Sketch the hydraulic drive you created.
– How is Pascal’s Law re...
• Questions to making a hydraulic syringe drive.
– Draw / Sketch the hydraulic drive you created.
– How is Pascal’s Law re...
• Questions to making a hydraulic syringe drive.
– Draw / Sketch the hydraulic drive you created.
– How is Pascal’s Law re...
• Questions to making a hydraulic syringe drive.
– Draw / Sketch the hydraulic drive you created.
– How is Pascal’s Law re...
• Questions to making a hydraulic syringe drive.
– Draw / Sketch the hydraulic drive you created.
Copyright © 2010 Ryan P....
• Questions to making a hydraulic syringe drive.
– Draw / Sketch the hydraulic drive you created.
Copyright © 2010 Ryan P....
• Questions to making a hydraulic syringe drive.
– How is Pascal’s Law related to the hydraulic drive you
just built?
Copy...
• Questions to making a hydraulic syringe drive.
– How is Pascal’s Law related to the hydraulic drive you
just built?
– An...
• Questions to making a hydraulic syringe drive.
– Would it work better with oil, or with creamy peanut
butter? Explain yo...
• Activity! Roving simple machine finding.
– Go stand by a simple machine.
– I will go around the room and point to you,
s...
• Activity! Roving simple machine finding.
– Go stand by a simple machine.
– I will go around the room and point to you,
s...
• Activity! Roving simple machine finding.
– Go stand by a simple machine.
– I will go around the room and point to you, s...
• Activity! Roving simple machine finding.
– Go stand by a simple machine.
– I will go around the room and point to you, s...
• Activity! Roving simple machine finding.
– Go stand by a simple machine.
– I will go around the room and point to you, s...
• Activity! Going to the gym with our journals to
investigate a compound machine in action.
– What simple machines are use...
• Name the Simple Machine
Wheel and axle
• Quiz Wiz! 1-10 Name the Simple Machine
Wheel and axle
• Quiz Wiz! 1-10 Name the Simple Machine
Wheel and axle
• Quiz Wiz! 1-10 Name the Simple Machine
Wheel and axle
• Quiz Wiz! 1-10 Name the Simple Machine
Wheel and axle
• Quiz Wiz! 1-10 Name the Simple Machine
Wheel and axle
• Quiz Wiz! 1-10 Name the Simple Machine
Wheel and axle
• Quiz Wiz! 1-10 Name the Simple Machine
Wheel and axle
• Quiz Wiz! 1-10 Name the Simple Machine
Wheel and axle
• Quiz Wiz! 1-10 Name the Simple Machine
Wheel and axle
• Quiz Wiz! 1-10 Name the Simple Machine
Wheel and axle
• Review – Name a few machines seen in
this animation.
• Quiz Wiz 1-10 Name the simple machine.
• Bonus – What simple machine do I represent.
• Answers to the Quiz
• Bonus – What simple machine do I represent.
• Simple Machine – Wheel and Axle for Axl Rose.
 Compound machines: Two or more simple
machines working together.
Copyright © 2010 Ryan P. Murphy
 Compound machines: Two or more simple
machines working together.
Copyright © 2010 Ryan P. Murphy
Lever
 Compound machines: Two or more simple
machines working together.
Copyright © 2010 Ryan P. Murphy
Lever
Wedge
Simple Machines: Learn more at..
http://www.cosi.org/downloads/activities/
simplemachines/sm1.html
• What two simple machines make this
pizza cutter and compound machine?
• Wheel and axle and the wedge.
• What two simple machines make up this
very simple can opener?
Copyright © 2010 Ryan P. Murphy
• Answer: Wedge and Lever
Copyright © 2010 Ryan P. Murphy
• What simple machines make this can
opener a compound machine?
• Wheel and Axle,
• Wheel and Axle, Lever,
• Wheel and Axle, Lever, Wedge
• Activity! Using a Dolly to move a person
down the hall.
– What two simple machines are being used?
• Answer: Wheel and Axle / Lever
• Answer: Wheel and Axle / Lever
– What class lever would it be?
• Answer: Wheel and Axle / Lever
– What class lever would it be?
Load
Fulcrum
Effort
• Answer: Wheel and Axle / Lever
– What class lever would it be?
– Answer: Third Class Lever
Load
Fulcrum
Effort
• Video Link! OK GO Rube Goldberg Machine
– http://www.youtube.com/watch?v=qybUFnY7Y8
w HD
– Teacher Tube:
http://www.teac...
• Additional Rube Goldberg Machines from
Japan.
– http://www.youtube.com/watch?v=VI47chBIgOU
• Activity! Crazy Machine (Optional)
– Your table group must use a ball bearing
(Start) to pop a balloon (Finish) using an...
• Activity! Crazy Machine (Optional)
– Your table group must use a ball bearing
(Start) to pop a balloon (Finish) using an...
• Activity! Crazy Machine (Optional)
– Your table group must use a ball bearing
(Start) to pop a balloon (Finish) using an...
• Activity! Crazy Machine (Optional)
– Your table group must use a ball bearing
(Start) to pop a balloon (Finish) using an...
• Activity! Crazy Machine (Optional)
– Your table group must use a ball bearing
(Start) to pop a balloon (Finish) using an...
• Activity! Crazy Machine (Optional)
– Your table group must use a ball bearing
(Start) to pop a balloon (Finish) using an...
• Table groups need to create a blue-print in
journal.
• Class materials include the following.
– Balloon
– Pulleys and st...
• Be the first to guess the hidden pictures
beneath the boxes.
– Raise your hand when you think you know.
You only get one...
• Try Again! Be the first to guess the hidden
pictures beneath the boxes.
– Raise your hand when you think you know.
You o...
• Try Again! Be the first to guess the hidden
pictures beneath the boxes.
– Raise your hand when you think you know.
You o...
• Good grade = Goes far
• Poor grade = Doesn’t go far
• Cool and colorful but doesn’t go far = Poor
grade!
• Mouster Truck Presentations.
– Students should place mousetrap car by their
poster board.
– Teacher will count you off, ...
Grade A+ A A- B+ B B- C D X
Distance
Meters
10+ 5+ 4.5 4.0 3.5 3.0 2.0 1.0 0
Possible Grading: Based solely on distance.
• Your homework bundle is due shortly.
Copyright © 2010 Ryan P. Murphy
• You can now add text to the white space
and neatly color the pictures to these parts.
Discuss the bungee
jumping egg
experience
Discuss the bungee
jumping egg
experience
Discuss the bungee
jumping egg
experience
Discuss the bungee
jumping egg
experience
Discuss the bungee
jumping egg
experience
Discuss the bungee
jumping egg
experience
Discuss the bungee
jumping egg
experience
Discuss the bungee
jumping egg
experience
Discuss the bungee
jumping egg
experience
Discuss the bungee
jumping egg
experience
• Activity! Answer with your feet.
A B
Teacher needs to label the
corners of the room.
C D
A B
Please walk safely and take some wrong
turns before traveling to the corner with
the correct answer.
C D
A B
All energy is…
A.) Kinetic or Potential.
B.) At a state of rest.
C.) Subjected to gravity.
D.) Work = Mass x Distance
...
A B
All energy is…
A.) Kinetic or Potential.
B.) At a state of rest.
C.) Subjected to gravity.
D.) Work = Mass x Distance
...
A B
Kinetic Energy is the energy an object
has because of it’s…
A.) Mass and Motion.
B.) Time and Space.
C.) Friction Leve...
A B
Kinetic Energy is the energy an object
has because of it’s…
A.) Mass and Motion.
B.) Time and Space.
C.) Friction Leve...
A B
This is a stiff bar that rests on a support
called a fulcrum which lifts or moves
loads.
A.) Wedge
B.) Inclined plane
...
A B
This is a stiff bar that rests on a support
called a fulcrum which lifts or moves
loads.
A.) Wedge
B.) Inclined plane
...
A B
This is the straight line from a circles
center to its perimeter.
A.) Diameter
B.) Distance
C.) Radius
D.) Mechanical ...
A B
This is the straight line from a circles
center to its perimeter.
A.) Diameter
B.) Distance
C.) Radius
D.) Mechanical ...
A B
This is the name for an object with at
least one slanting side ending in a
sharp edge, which cuts material apart.
A.) ...
A B
This is the name for an object with at
least one slanting side ending in a
sharp edge, which cuts material apart.
A.) ...
A B
This is the name for a slanting surface
connecting a lower level to a higher
level.
A.) Block and Tackle
B.) Wedge
C.)...
A B
This is the name for a slanting surface
connecting a lower level to a higher
level.
A.) Block and Tackle
B.) Wedge
C.)...
A B
• Machines do all of the following except…
A.) Transfer force from one place to another.
B.) Change direction of a for...
A B
• Machines do all of the following except…
A.) Transfer force from one place to another.
B.) Change direction of a for...
A B
What is the MA of this inclined plane?
A.) 2
B.) 4
C.) 8
D.) 32
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A three part 1500+ PowerPoint slideshow from www.sciencepowerpoint.com becomes the roadmap for an interactive and amazing science experience that includes a bundled homework package, answer keys, unit notes, video links, review games, built-in quizzes and hands-on activities, worksheets, rubrics, games, and much more.
Also included are instruction to create a student version of the unit that is much like the teachers but missing the answer keys, quizzes, PowerPoint review games, hidden box challenges, owl, and surprises meant for the classroom. This is a great resource to distribute to your students and support professionals.
Text for the unit PowerPoint is presented in large print (32 font) and is placed at the top of each slide so it can seen and read from all angles of a classroom. A shade technique, as well as color coded text helps to increase student focus and allows teacher to control the pace of the lesson. Also included is a 12 page assessment / bundled homework that chronologically follows the slideshow for nightly homework and the end of the unit assessment, as well as a 8 page modified assessment. 9 pages of class notes with images are also included for students who require assistance, as well as answer keys to both of the assessments for support professionals, teachers, and homeschool parents. Many video links are provided and a slide within the slideshow cues teacher / parent when the videos are most relevant to play. Video shorts usually range from 2-7 minutes and are included in organized folders. Two PowerPoint Review games are included. Answers to the PowerPoint Review Games are provided in PowerPoint form so students can self-assess. Lastly, several class games such as guess the hidden picture beneath the boxes, and the find the hidden owl somewhere within the slideshow are provided. Difficulty rating of 8 (Ten is most difficult).
Areas of Focus: -Newton's First Law, Inertia, Friction, Four Types of Friction, Negatives and Positives of Friction, Newton's Third Law, Newton's Second Law, Potential Energy, Kinetic Energy, Mechanical Energy, Forms of Potential to Kinetic Energy, Speed, Velocity, Acceleration, Deceleration, Momentum, Work, Machines (Joules), Catapults, Trajectory, Force, Simple Machines, Pulley / (MA Mechanical Advantage), Lever /(MA),Wedge /(MA), Wheel and Axle (MA), Inclined Plane / (MA), Screw /(MA).
This unit aligns with the Next Generation Science Standards and with Common Core Standards for ELA and Literacy for Science and Technical Subjects. See preview for more information
If you have any questions please feel free to contact me. Thanks again and best wishes. Sincerely, Ryan Murphy M.Ed www.sciencepowerpoint@gmail.com
Teaching Duration = 4+ Weeks

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Simple Machines PowerPoint

  1. 1. • What is the MA of this lever? – MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 6 Meters 3 meters Effort Arm (6 meters) / Resistance Arm (3 Meters) = MA 2
  2. 2. • RED SLIDE: These are notes that are very important and should be recorded in your science journal. Copyright © 2010 Ryan P. Murphy
  3. 3. -Nice neat notes that are legible and use indentations when appropriate. -Example of indent. -Skip a line between topics -Make visuals clear and well drawn. Please label. Effort Arm Resistance Arm
  4. 4. • RED SLIDE: These are notes that are very important and should be recorded in your science journal. • BLACK SLIDE: Pay attention, follow directions, complete projects as described and answer required questions neatly. Copyright © 2010 Ryan P. Murphy
  5. 5. • http://sciencepowerpoint.com/
  6. 6.  Machine: Anything that helps you do work.
  7. 7.  Machine: Anything that helps you do work.  Work = Force x Distance
  8. 8. • Which of the following is not something machines do. – B.) Machines can change the direction of the force you put in. ( ex. A Car jack) – C.) Machines create energy in order to complete a force. (ex. reactor) – D.) Machines can increase the speed of the force. (ex. Bicycle)
  9. 9. • Which of the following is not something machines do. – A.) Machines can make the force you put into a machine greater. (ex. Pliers) – B.) Machines can change the direction of the force you put in. ( ex. A Car jack) – C.) Machines create energy in order to complete a force. (ex. reactor) – D.) Machines can increase the speed of the force. (ex. Bicycle)
  10. 10. • Which of the following is not something machines do. – A.) Machines can make the force you put into a machine greater. (ex. Pliers) – B.) Machines can change the direction of the force you put in. ( ex. A Car jack) – C.) Machines create energy in order to complete a force. (ex. reactor) – D.) Machines can increase the speed of the force. (ex. Bicycle)
  11. 11. • Which of the following is not something machines do. – A.) Machines can make the force you put into a machine greater. (ex. Pliers) – B.) Machines can change the direction of the force you put in. ( ex. A Car jack) – C.) Machines create energy in order to complete a force. (ex. reactor) – D.) Machines can increase the speed of the force. (ex. Bicycle)
  12. 12. • Which of the following is not something machines do. – A.) Machines can make the force you put into a machine greater. (ex. Pliers) – B.) Machines can change the direction of the force you put in. ( ex. A Car jack) – C.) Machines create energy in order to complete a force. (ex. reactor) – D.) Machines can increase the speed of the force. (ex. Bicycle)
  13. 13. • Which of the following is not something machines do. – A.) Machines can make the force you put into a machine greater. (ex. Pliers) – B.) Machines can change the direction of the force you put in. ( ex. A Car jack) – C.) Machines create energy in order to complete a force. (ex. reactor) – D.) Machines can increase the speed of the force. (ex. Bicycle)
  14. 14. • Which of the following is not something machines do. – A.) Machines can make the force you put into a machine greater. (ex. Pliers) – B.) Machines can change the direction of the force you put in. ( ex. A Car jack) – C.) Machines create energy in order to complete a force. (ex. reactor) – D.) Machines can increase the speed of the force. (ex. Bicycle)
  15. 15. • Match the correct work of machines to the picture. – A.) Machines can increase the speed of the force. – B.) Machines can make the force you put into a machine greater. – C.) Machines can change the direction of the force you put in.
  16. 16. • Match the correct work of machines to the picture. – A.) Machines can increase the speed of the force. – B.) Machines can make the force you put into a machine greater. – C.) Machines can change the direction of the force you put in.
  17. 17. • Match the correct work of machines to the picture. – A.) Machines can increase the speed of the force. – B.) Machines can make the force you put into a machine greater. – C.) Machines can change the direction of the force you put in.
  18. 18. • Match the correct work of machines to the picture. – A.) Machines can increase the speed of the force. – B.) Machines can make the force you put into a machine greater. – C.) Machines can change the direction of the force you put in.
  19. 19. • Match the correct work of machines to the picture. – A.) Machines can increase the speed of the force. – B.) Machines can make the force you put into a machine greater. – C.) Machines can change the direction of the force you put in.
  20. 20. • Match the correct work of machines to the picture. – A.) Machines can increase the speed of the force. – B.) Machines can make the force you put into a machine greater. – C.) Machines can change the direction of the force you put in.
  21. 21. • Match the correct work of machines to the picture. – A.) Machines can increase the speed of the force. – B.) Machines can make the force you put into a machine greater. – C.) Machines can change the direction of the force you put in.
  22. 22. • Law Conservation of energy: energy cannot be created or destroyed.
  23. 23. • Law Conservation of energy: energy cannot be created or destroyed. – Simple machines generally require more work / energy to complete a task. Example
  24. 24. • Law Conservation of energy: energy cannot be created or destroyed. – Simple machines generally require more work / energy to complete a task. Example
  25. 25. • Law Conservation of energy: energy cannot be created or destroyed. – Simple machines generally require more work / energy to complete a task. Example
  26. 26. • Law Conservation of energy: energy cannot be created or destroyed. – Simple machines generally require more work / energy to complete a task. Example
  27. 27. • Law Conservation of energy: energy cannot be created or destroyed. – Simple machines generally require more work / energy to complete a task. Example
  28. 28. • Law Conservation of energy: energy cannot be created or destroyed. – Simple machines generally require more work / energy to complete a task. Example
  29. 29. • Law Conservation of energy: energy cannot be created or destroyed. – Simple machines generally require more work / energy to complete a task. Example
  30. 30. • Law Conservation of energy: energy cannot be created or destroyed. – Simple machines generally require more work / energy to complete a task. Example
  31. 31. • Law Conservation of energy: energy cannot be created or destroyed. – Simple machines generally require more work / energy to complete a task. Example
  32. 32. • Law Conservation of energy: energy cannot be created or destroyed. – Simple machines generally require more work / energy to complete a task. Example
  33. 33. • Law Conservation of energy: energy cannot be created or destroyed. – Simple machines generally require more work / energy to complete a task. Example
  34. 34. • Law Conservation of energy: energy cannot be created or destroyed. – Simple machines generally require more work / energy to complete a task. Example
  35. 35. • Law Conservation of energy: energy cannot be created or destroyed. – Simple machines generally require more work / energy to complete a task. Example
  36. 36. • Law Conservation of energy: energy cannot be created or destroyed. – Simple machines generally require more work / energy to complete a task. Example
  37. 37. • Law Conservation of energy: energy cannot be created or destroyed. – Simple machines generally require more work / energy to complete a task. Example
  38. 38. • Law Conservation of energy: energy cannot be created or destroyed. – Simple machines generally require more work / energy to complete a task. Example
  39. 39. • Law Conservation of energy: energy cannot be created or destroyed. – Simple machines generally require more work / energy to complete a task. Example
  40. 40.  Efficiency: A measure of how much more work must be put into a machine than you get out of the machine.
  41. 41.  Efficiency: A measure of how much more work must be put into a machine than you get out of the machine.  The efficiency of a machine will always be less than 100%.
  42. 42. • Efficiency: A measure of how much more work must be put into a machine than you get out of the machine. – The efficiency of a machine will always be less than 100%. – If there was no friction, the best you could hope for is an efficiency of 100% meaning work in = work out.
  43. 43. • Efficiency: A measure of how much more work must be put into a machine than you get out of the machine. – The efficiency of a machine will always be less than 100%. – If there was no friction, the best you could hope for is an efficiency of 100% meaning work in = work out.
  44. 44. • Efficiency: A measure of how much more work must be put into a machine than you get out of the machine. – The efficiency of a machine will always be less than 100%. – If there was no friction, the best you could hope for is an efficiency of 100% meaning work in = work out.
  45. 45.  Force is measured in a unit called the Newton. Copyright © 2010 Ryan P. Murphy
  46. 46.  Force is measured in a unit called the Newton. Copyright © 2010 Ryan P. Murphy
  47. 47.  Force is measured in a unit called the Newton. Copyright © 2010 Ryan P. Murphy
  48. 48.  Force is measured in a unit called the Newton. Copyright © 2010 Ryan P. Murphy
  49. 49.  Force is measured in a unit called the Newton. Copyright © 2010 Ryan P. Murphy
  50. 50.  Force is measured in a unit called the Newton. Copyright © 2010 Ryan P. Murphy
  51. 51.  Force is measured in a unit called the Newton. Copyright © 2010 Ryan P. Murphy
  52. 52.  Force is measured in a unit called the Newton. Copyright © 2010 Ryan P. Murphy
  53. 53.  Force is measured in a unit called the Newton. Copyright © 2010 Ryan P. Murphy
  54. 54.  Force is measured in a unit called the Newton. Copyright © 2010 Ryan P. Murphy
  55. 55.  One Newton is the amount of force required to give a 1 kg mass an acceleration of 1 m/s/s. Copyright © 2010 Ryan P. Murphy
  56. 56.  One Newton is the amount of force required to give a 1 kg mass an acceleration of 1 m/s/s. Copyright © 2010 Ryan P. Murphy
  57. 57.  One Newton is the amount of force required to give a 1 kg mass an acceleration of 1 m/s/s. Copyright © 2010 Ryan P. Murphy Learn more: Force. http://www.physicsclassroom.com/class/newt laws/u2l2a.cfm
  58. 58. • One Newton is the amount of force required to give a 1 kg mass an acceleration of 1 m/s/s. Copyright © 2010 Ryan P. Murphy
  59. 59. • One Newton is the amount of force required to give a 1 kg mass an acceleration of 1 m/s/s. Copyright © 2010 Ryan P. Murphy
  60. 60.  Mass: Amount of matter in an object. Copyright © 2010 Ryan P. Murphy
  61. 61. Copyright © 2010 Ryan P. Murphy
  62. 62. “I’m weightless but I still have mass.” Copyright © 2010 Ryan P. Murphy
  63. 63.  New Area of focus: Simple Machines. Copyright © 2010 Ryan P. Murphy
  64. 64. • Activity: Ancient use of Simple Machines. – Use PVC piping to move an upside down lab table and some people sitting on it down the hall. Copyright © 2010 Ryan P. Murphy
  65. 65. • Set-up of challenge. – Move pipes from the rear to the front before the table moves. – How efficient can your group work?
  66. 66. • Please reflect upon the activity. – What type of machine was used? – Did it help? Copyright © 2010 Ryan P. Murphy
  67. 67.  Mechanical advantage (MA): The number of times a machine multiplies your effort force. Copyright © 2010 Ryan P. Murphy
  68. 68.  To find MA  Divide resistance force (usually weight in g) by the effort force (Newtons) Copyright © 2010 Ryan P. Murphy
  69. 69.  To find MA  Divide resistance force (usually weight in g) by the effort force (Newton) Copyright © 2010 Ryan P. Murphy
  70. 70.  To find MA  Divide resistance force (usually weight in g) by the effort force (Newton) Copyright © 2010 Ryan P. Murphy
  71. 71.  To find MA  Divide resistance force (usually weight in g) by the effort force (Newton) Copyright © 2010 Ryan P. Murphy
  72. 72.  To find MA  Divide resistance force (usually weight in g) by the effort force (Newton) Copyright © 2010 Ryan P. Murphy
  73. 73.  To find MA  Divide resistance force (usually weight in g) by the effort force (Newton) Copyright © 2010 Ryan P. Murphy FO = MA
  74. 74.  To find MA  Divide resistance force (usually weight in g) by the effort force (Newton) Copyright © 2010 Ryan P. Murphy FO FI = MA
  75. 75. • Find the MA of the following. • The work input was 2, and the output was 18.
  76. 76. • Find the MA of the following. • The work input was 2, and the output was 18.
  77. 77. • Find the MA of the following. • The work input was 2, and the output was 18. FI FO
  78. 78. • Find the MA of the following. • The work input was 2, and the output was 18. FI FO
  79. 79. • Find the MA of the following. • The work input was 2, and the output was 18. FI FO
  80. 80. • Find the MA of the following. • The work input was 2, and the output was 18. FI FO 2 18
  81. 81. • Find the MA of the following. • The work input was 2, and the output was 18. FI FO 2 18 = 9 MA
  82. 82. • Find the MA of the following. • The work input was 2, and the output was 18. FI FO 2 18 = 9 MA Mechanical Advantage: Learn More at… http://www.wisc- online.com/objects/ViewObject.aspx?ID=ENG20504
  83. 83. 12 N 6 N
  84. 84. 12 N 6 NFO FI
  85. 85. 12 N 6 NFO FI
  86. 86. 12 N 6 NFO FI
  87. 87. 12 N 6 NFO FI 6N 12N
  88. 88. 12 N 6 NFO FI 6N 12N = 12 MA
  89. 89. 40 N 20 N
  90. 90. 40 N 20 N FO FI
  91. 91. 40 N 20 N FO FI
  92. 92. 40 N 20 N FO FI 20N 40N
  93. 93. 40 N 20 N FO FI 20N 40N = 2 MA
  94. 94. 40 N 20 N FO FI 20N 40N = 2 MA
  95. 95. 90 N 45 N
  96. 96. 90 N 45 N FO FI
  97. 97. 90 N 45 N FO FI 45N 90N
  98. 98. 90 N 45 N FO FI 45N 90N = 2 MA
  99. 99. • Law Conservation of Energy
  100. 100. • Law Conservation of Energy – Energy cannot be created or destroyed.
  101. 101. • Law Conservation of Energy – Energy cannot be created or destroyed. – Energy can be transferred.
  102. 102. • Law Conservation of Energy – Energy cannot be created or destroyed. – Energy can be transferred.
  103. 103. • Law Conservation of Energy – Energy cannot be created or destroyed. – Energy can be transferred.
  104. 104. • Video Links! Mechanical Advantage, Khan Academy, Optional (Advanced) (I,II,III) – http://www.khanacademy.org/science/physics/m echanics/v/introduction-to-mechanical-advantage (Part 1) – http://www.khanacademy.org/science/physics/m echanics/v/mechanical-advantage--part-2 (2) – http://www.khanacademy.org/science/physics/m echanics/v/mechanical-advantage--part-3 (3)
  105. 105.  Simple machines: Types of machines that do work with one movement. Copyright © 2010 Ryan P. Murphy
  106. 106.  Simple machines: Types of machines that do work with one movement. Copyright © 2010 Ryan P. Murphy
  107. 107.  Simple machines: Types of machines that do work with one movement. Copyright © 2010 Ryan P. Murphy
  108. 108.  Simple machines: Types of machines that do work with one movement. Copyright © 2010 Ryan P. Murphy
  109. 109.  Simple machines: Types of machines that do work with one movement. Copyright © 2010 Ryan P. Murphy
  110. 110.  Simple machines: Types of machines that do work with one movement. Copyright © 2010 Ryan P. Murphy
  111. 111.  Simple machines: Types of machines that do work with one movement. Copyright © 2010 Ryan P. Murphy
  112. 112.  Simple machines: Types of machines that do work with one movement. Copyright © 2010 Ryan P. Murphy
  113. 113.  Simple machines: Types of machines that do work with one movement. Copyright © 2010 Ryan P. Murphy
  114. 114.  Simple machines: Types of machines that do work with one movement. Copyright © 2010 Ryan P. Murphy
  115. 115. • Simple Machines Available Sheet: Pulleys
  116. 116.  Pulley  Uses grooved wheels and a rope to raise, lower or move a load. Copyright © 2010 Ryan P. Murphy
  117. 117.  Pulley  Uses grooved wheels and a rope to raise, lower or move a load. Copyright © 2010 Ryan P. Murphy
  118. 118.  A pulley makes work seem easier Copyright © 2010 Ryan P. Murphy
  119. 119.  A pulley makes work seem easier Copyright © 2010 Ryan P. Murphy
  120. 120.  A pulley makes work seem easier  Changes the direction of motion to work with gravity. Copyright © 2010 Ryan P. Murphy
  121. 121.  A pulley makes work seem easier  Changes the direction of motion to work with gravity. Instead of lifting up, you can pull down. Copyright © 2010 Ryan P. Murphy
  122. 122.  A pulley makes work seem easier  Changes the direction of motion to work with gravity. Instead of lifting up, you can pull down.  Uses your body weight against the resistance. Copyright © 2010 Ryan P. Murphy
  123. 123.  The more pulleys that are used, the more the MA (Mechanical Advantage). Copyright © 2010 Ryan P. Murphy
  124. 124.  The more pulleys that are used, the more the MA (Mechanical Advantage). Copyright © 2010 Ryan P. Murphy
  125. 125.  MA = The number of ropes that support the pulley. The end of the rope doesn’t count.  What is the MA of this pulley system below? Copyright © 2010 Ryan P. Murphy
  126. 126. • MA = The number of ropes that support the pulley. The end of the rope doesn’t count. – What is the MA of this pulley system below? Copyright © 2010 Ryan P. Murphy
  127. 127. • MA = The number of ropes that support the pulley. The end of the rope doesn’t count. MA =2 – What is the MA of this pulley system below? Copyright © 2010 Ryan P. Murphy
  128. 128. • MA = The number of ropes that support the pulley. The end of the rope doesn’t count. MA =2 – What is the MA of this pulley system below? Copyright © 2010 Ryan P. Murphy
  129. 129. • MA = The number of ropes that support the pulley. The end of the rope doesn’t count. MA =2 – What is the MA of this pulley system below? Copyright © 2010 Ryan P. Murphy FI =
  130. 130. • MA = The number of ropes that support the pulley. The end of the rope doesn’t count. MA =2 – What is the MA of this pulley system below? Copyright © 2010 Ryan P. Murphy FO FI
  131. 131. • MA = The number of ropes that support the pulley. The end of the rope doesn’t count. MA =2 – What is the MA of this pulley system below? Copyright © 2010 Ryan P. Murphy FO FI FI FO
  132. 132. • MA = The number of ropes that support the pulley. The end of the rope doesn’t count. MA =2 – What is the MA of this pulley system below? Copyright © 2010 Ryan P. Murphy FO FI FI FO 100 kg 50 kg
  133. 133. • MA = The number of ropes that support the pulley. The end of the rope doesn’t count. MA =2 – What is the MA of this pulley system below? Copyright © 2010 Ryan P. Murphy FO FI FI FO 100 kg 50 kg = 2 MA
  134. 134. • What is the MA of this pulley system? MA=2 Copyright © 2010 Ryan P. Murphy
  135. 135. • Answer, the MA is 4. Copyright © 2010 Ryan P. Murphy
  136. 136. • Answer, the MA is 4. Copyright © 2010 Ryan P. Murphy
  137. 137. • Answer, the MA is 4. Copyright © 2010 Ryan P. Murphy FI FO
  138. 138. • Answer, the MA is 4. Copyright © 2010 Ryan P. Murphy FI FO FI FO
  139. 139. • Answer, the MA is 4. Copyright © 2010 Ryan P. Murphy FI FO FI FO
  140. 140. • Answer, the MA is 4. Copyright © 2010 Ryan P. Murphy FI FO FI FO 100 25
  141. 141. • Answer, the MA is 4. Copyright © 2010 Ryan P. Murphy FI FO FI FO 100 25 = 4 MA
  142. 142. • What is the MA?
  143. 143. • What is the MA?
  144. 144. • What is the MA?
  145. 145. • What is the MA?
  146. 146. • What is the MA?
  147. 147. • What is the MA?
  148. 148. • What is the MA?
  149. 149. • What is the MA?
  150. 150. • What is the MA?
  151. 151. • Pulley Simulator: (Optional) – http://www.compassproject.net/sims/pulley.html
  152. 152.  Three types of pulleys  -  -  - Copyright © 2010 Ryan P. Murphy
  153. 153.  Fixed pulley  No MA Copyright © 2010 Ryan P. Murphy
  154. 154.  Fixed pulley  No MA Copyright © 2010 Ryan P. Murphy
  155. 155.  Movable Pulley (MA of 2) Copyright © 2010 Ryan P. Murphy
  156. 156.  Movable Pulley (MA of 2) Copyright © 2010 Ryan P. Murphy
  157. 157.  Combined Pulley / Block and tackle Copyright © 2010 Ryan P. Murphy
  158. 158. • Rock climbing uses pulleys. Copyright © 2010 Ryan P. Murphy
  159. 159. • Rock climbing uses pulleys. Copyright © 2010 Ryan P. Murphy
  160. 160. • Rock climbing uses pulleys. Copyright © 2010 Ryan P. Murphy
  161. 161. • Sailing uses pulleys to ease difficult jobs. Copyright © 2010 Ryan P. Murphy
  162. 162. Pulleys
  163. 163. • The chain on your bicycle is a pulley.
  164. 164. • Quiz Wiz 1-10 Fixed Pulley, Moveable Pulley, Block and Tackle/Combined Pulley Copyright © 2010 Ryan P. Murphy
  165. 165. • * Bonus: Name this family that used simple machines to create a tree house?
  166. 166. • Answers! Quiz Wiz 1-10 Fixed Pulley, Moveable Pulley, Block and Tackle/Combined Pulley Copyright © 2010 Ryan P. Murphy
  167. 167. • * Bonus: Name this family that used simple machines to create a tree house?
  168. 168. • * Bonus: Name this family that used simple machines to create a tree house?
  169. 169. • Activity! Using the three types of Pulleys Copyright © 2010 Ryan P. Murphy
  170. 170. • Activity! Using the three types of Pulleys Copyright © 2010 Ryan P. Murphy I wonder what the MA of this pulley system is?
  171. 171. • Activity! Using the three types of Pulleys Copyright © 2010 Ryan P. Murphy I wonder what the MA of this pulley system is?
  172. 172. • Activity! Using the three types of Pulleys Copyright © 2010 Ryan P. Murphy I wonder what the MA of this pulley system is?
  173. 173. Top Pulley Bottom Pulley
  174. 174. Top Pulley Bottom Pulley
  175. 175. Top Pulley Bottom Pulley
  176. 176. Top Pulley Bottom Pulley
  177. 177. Top Pulley Bottom Pulley
  178. 178. • Simple Machines Available Sheet.
  179. 179. Please create this spreadsheet in your journal. Weight (g) newtons No Pulley ____ grams Fixed Pulley ____ grams Combined Pulley 2 ____ grams Combined Pulley 4 ____ grams Copyright © 2010 Ryan P. Murphy
  180. 180. • Please use the materials to do the following. –Measure the newtons required with a Spring Scale to lift the ____ grams of weight with the different pulleys described in the spreadsheet. Copyright © 2010 Ryan P. Murphy
  181. 181. • Please use the materials to do the following. –Measure the newtons required with a Spring Scale to lift the ____ grams of weight with the different pulleys described in the spreadsheet. Copyright © 2010 Ryan P. Murphy Remember to zero your spring scale!
  182. 182. • Please use the materials to do the following. – Record the newtons required with a Spring Scale to lift the ____ grams of weight with a fixed pulley.
  183. 183. • Fixed Pulley System Construction
  184. 184. • Fixed Pulley System Construction
  185. 185. • Fixed Pulley System Construction
  186. 186. • Fixed Pulley System Construction
  187. 187. • Fixed Pulley System Construction
  188. 188. • Fixed Pulley System Construction
  189. 189. • Fixed Pulley System Construction
  190. 190. • Please use the materials to do the following. –Record the newtons with a combined pulley to lift the weight? Spring Scale Copyright © 2010 Ryan P. Murphy
  191. 191. • Two Pulley System Construction
  192. 192. • Two Pulley System Construction
  193. 193. • Two Pulley System Construction
  194. 194. • Two Pulley System Construction
  195. 195. • Two Pulley System Construction
  196. 196. • Two Pulley System Construction
  197. 197. • Two Pulley System Construction
  198. 198. • Two Pulley System Construction
  199. 199. • Please use the materials to do the following. – Record newtons with a combined pulley (4) to lift the ____ grams of weight?
  200. 200. • 4 Pulley System Construction
  201. 201. • 4 Pulley System Construction
  202. 202. • 4 Pulley System Construction Two wheels / Pulley
  203. 203. • 4 Pulley System Construction Two wheels / Pulley
  204. 204. • 4 Pulley System Construction
  205. 205. • 4 Pulley System Construction
  206. 206. • If you don’t have double pulleys, you can still use 4 single pulley’s like so. Copyright © 2010 Ryan P. Murphy
  207. 207. • Create a moveable pulley to lower the ___ gram weight into the bucket without touching it. Copyright © 2010 Ryan P. Murphy
  208. 208. • Questions? – What was the advantage in newtons to use a fixed pulley rather than no pulley at all? – What was the advantage in Newtons to use a combined pulley over a fixed pulley? – What was the advantage in Newtons to use a combined pulley (4) over a combined pulley (2)? – Did a moveable pulley allow you to move the load with minimal effort? Copyright © 2010 Ryan P. Murphy
  209. 209. • Questions? – What was the advantage in newtons to use a fixed pulley rather than no pulley at all? – What was the advantage in newtons to use a combined pulley over a fixed pulley? – What was the advantage in Newtons to use a combined pulley (4) over a combined pulley (2)? – Did a moveable pulley allow you to move the load with minimal effort? Copyright © 2010 Ryan P. Murphy
  210. 210. • Questions? – What was the advantage in newtons to use a fixed pulley rather than no pulley at all? – What was the advantage in newtons to use a combined pulley over a fixed pulley? – What was the advantage in newtons to use a combined pulley (4) over a combined pulley (2)? – Did a moveable pulley allow you to move the load with minimal effort? Copyright © 2010 Ryan P. Murphy
  211. 211. • Questions? – What was the advantage in newtons to use a fixed pulley rather than no pulley at all? – What was the advantage in newtons to use a combined pulley over a fixed pulley? – What was the advantage in newtons to use a combined pulley (4) over a combined pulley (2)? – Did a moveable pulley allow you to move the load with minimal effort? Copyright © 2010 Ryan P. Murphy
  212. 212. Weight (g) Newton No Pulley ___ grams 5 newtons Fixed Pulley ___ grams 5 newtons? Combined Pulley 2 ___ grams 3 newtons? Combined Pulley 4 ___ grams 1 newtons? Copyright © 2010 Ryan P. Murphy
  213. 213. • Questions? – What was the advantage in newtons to use a fixed pulley rather than no pulley at all? Copyright © 2010 Ryan P. Murphy
  214. 214. • Questions? – What was the advantage in newtons to use a fixed pulley rather than no pulley at all? – There was no Mechanical Advantage (MA) when using the fixed pulley. It was easier because you didn’t have to bend down. Copyright © 2010 Ryan P. Murphy
  215. 215. • Questions? – What was the advantage in newtons to use a combined pulley over a fixed pulley? Copyright © 2010 Ryan P. Murphy
  216. 216. • Questions? – What was the advantage in newtons to use a combined pulley over a fixed pulley? – The combined pulley required less force (2 newtons) to lift the load. The Mechanical Advantage was 2 newtons. Copyright © 2010 Ryan P. Murphy
  217. 217. • Questions? – What was the advantage in newtons to use a combined pulley (4) over a combined pulley (2)? Copyright © 2010 Ryan P. Murphy
  218. 218. • Questions? – What was the advantage in newtons to use a combined pulley (4) over a combined pulley (2)? – The (MA) was 4. It only took 1 newton to lift the load compared 3 newtons with the combined 2 pulley, and 5 newtons with no pulley at all. Copyright © 2010 Ryan P. Murphy
  219. 219. Pulleys. Learn more at… http://www.swe.org/iac/lp/pulley_03.html
  220. 220. • Questions? – Did a moveable pulley allow you to move the load with minimal effort? Copyright © 2010 Ryan P. Murphy
  221. 221. • Questions? – Did a moveable pulley allow you to move the load with minimal effort? – The pulley moved along the rope very easily. We were able to move the load easily once it was lifted. The pulley rolled down the rope because of it’s potential energy. • Not very good for lifting. Copyright © 2010 Ryan P. Murphy
  222. 222. • Simple Machines Available Sheet: Levers
  223. 223.  Lever -
  224. 224.  Lever A stiff bar that rests on a support called a fulcrum which lifts or moves loads.
  225. 225.  MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy
  226. 226.  MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy
  227. 227.  MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy
  228. 228.  MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy Or…
  229. 229.  MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 120 N FI FO 360 N
  230. 230.  MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 120 N FI FO 360 N= FO FI
  231. 231.  MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 120 N FI FO 360 N= FO 360 N FI 120 N
  232. 232.  MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 120 N FI FO 360 N=3 MA FO 360 N FI 120 N
  233. 233. • What is the MA of this lever? – MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 6 Meters 3 meters
  234. 234. • What is the MA of this lever? – MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 6 Meters 3 meters Effort Arm (6 meters) /
  235. 235. • What is the MA of this lever? – MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 6 Meters 3 meters Effort Arm (6 meters) / Resistance Arm (3 Meters)
  236. 236. • What is the MA of this lever? – MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 6 Meters 3 meters Effort Arm (6 meters) / Resistance Arm (3 Meters) = MA 2
  237. 237. • What is the MA of this lever? – MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 12 meters4 meters
  238. 238. • What is the MA of this lever? – MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 12 meters4 meters
  239. 239. • What is the MA of this lever? – MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 12 meters4 meters
  240. 240. • What is the MA of this lever? – MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 12 meters4 meters 12 meters / 4 meters =
  241. 241. • What is the MA of this lever? – MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 12 meters4 meters 12 meters / 4 meters = MA 3
  242. 242. • What is the MA of this lever? – MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 90 N 30 N
  243. 243. • What is the MA of this lever? – MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy FO FI 90 N 30 N
  244. 244. • What is the MA of this lever? – MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy FO FI 90 N 30 N
  245. 245. • What is the MA of this lever? – MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy FO FI 90 N 30 N
  246. 246. • What is the MA of this lever? – MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy FO FI 30 N 90 N 90 N 30 N
  247. 247. • What is the MA of this lever? – MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy =3 MA FO FI 30 N 90 N 90 N 30 N
  248. 248. • Video Link! Levers and skateboarding. – http://www.youtube.com/watch?v=72ZNEactb-k
  249. 249.  The 3 types of levers  -  -  - Copyright © 2010 Ryan P. Murphy
  250. 250.  The 3 types of levers  -  -  - Copyright © 2010 Ryan P. Murphy
  251. 251.  The 3 types of levers  -  -  - Copyright © 2010 Ryan P. Murphy
  252. 252.  The 3 types of levers  -  -  - Copyright © 2010 Ryan P. Murphy
  253. 253.  The 3 types of levers  -  -  - Copyright © 2010 Ryan P. Murphy
  254. 254. • Which is a first, second, and third class lever.? – Please put your finger in the air when the square lights up.
  255. 255. • Which is a first, second, and third class lever.? – Please put your finger in the air when the square lights up.
  256. 256. • Which is a first, second, and third class lever.? – Please put your finger in the air when the square lights up.
  257. 257. • Which is a first, second, and third class lever.? – Please put your finger in the air when the square lights up.
  258. 258. • Which is a first, second, and third class lever.? – Please put your finger in the air when the square lights up.
  259. 259. • Which is a first, second, and third class lever.? – Please put your finger in the air when the square lights up.
  260. 260. • Which is a first, second, and third class lever.? – Please put your finger in the air when the square lights up.
  261. 261.  First Class Lever Copyright © 2010 Ryan P. Murphy
  262. 262. • The law of equilibrium is: The effort multiplied by its distance from the fulcrum equals the load multiplied by its distance from the fulcrum.
  263. 263. • The law of equilibrium is: The effort multiplied by its distance from the fulcrum equals the load multiplied by its distance from the fulcrum. – True or False? – 2 lbs of effort exerted 4 feet from the fulcrum will lift 8 lbs located 1 foot on the other side of fulcrum.
  264. 264. • The law of equilibrium is: The effort multiplied by its distance from the fulcrum equals the load multiplied by its distance from the fulcrum. – True or False? – 2 lbs of effort exerted 4 feet from the fulcrum will lift 8 lbs located 1 foot on the other side of fulcrum.
  265. 265. • The law of equilibrium is: The effort multiplied by its distance from the fulcrum equals the load multiplied by its distance from the fulcrum. – True or False? – 2 lbs of effort exerted 4 feet from the fulcrum will lift 8 lbs located 1 foot on the other side of fulcrum.
  266. 266. • Activity! Sending a stuffed toy flying. – Create a first class lever and send and toy into the air by jumping on the effort arm.
  267. 267. • Activity! Sending a stuffed toy flying. – Create a first class lever and send and toy into the air by jumping on the effort arm.
  268. 268. • Activity! Sending a stuffed toy flying. – Create a first class lever and send and toy into the air by jumping on the effort arm.
  269. 269. • Activity! Sending a stuffed toy flying. – Create a first class lever and send and toy into the air by jumping on the effort arm.
  270. 270. • Activity! Sending a stuffed toy flying. – Create a first class lever and send and toy into the air by jumping on the effort arm.
  271. 271. • Activity! Sending a stuffed toy flying. – Change the fulcrum, Will this change how high the toy will travel.
  272. 272. • Activity! Sending a stuffed toy flying. – Change the fulcrum, Will this change how high the toy will travel.
  273. 273. • Activity! Sending a stuffed toy flying. – Change the fulcrum, Will this change how high the toy will travel.
  274. 274. • Activity! Sending a stuffed toy flying. – Change the fulcrum, Will this change how high the toy will travel.
  275. 275. • Activity! Sending a stuffed toy flying. – Change the fulcrum, Will this change how high the toy will travel.
  276. 276. • Activity! Sending a stuffed toy flying. – Change the fulcrum, Will this change how high the toy will travel.
  277. 277. • Activity! Sending a stuffed toy flying. – Change the fulcrum, Will this change how high the toy will travel.
  278. 278. • Activity! Sending a stuffed toy flying. – Change the fulcrum, Will this change how high the toy will travel.
  279. 279. • Activity! Sending a stuffed toy flying. – Change the fulcrum, Will this change how high the toy will travel.
  280. 280. • Activity! Sending a stuffed toy flying. – Change the fulcrum, Will this change how high the toy will travel.
  281. 281. • Activity! Sending a stuffed toy flying. – Change the fulcrum, Will this change how high the toy will travel.
  282. 282. • Activity! Sending a stuffed toy flying. – Change the fulcrum, Will this change how high the toy will travel.
  283. 283. • Simple Machines Available Sheet: Levers
  284. 284. • Activity! Levers – Please record the spreadsheet below in your journal. Mechanical Advantage # of newtons to lift lever Just the weight (_____grams) No MA E arm = 25cm R arm = 5cm E arm = 20cm R arm = 10cm E arm = 15cm R arm = 15cm E arm = 10cm R arm = 20cm E arm = 5cm R arm = 25cm Copyright © 2010 Ryan P. Murphy
  285. 285. • Please set up your first class lever system as follows. – Use the centimeters on the ruler to set up lever and determine MA. Crayola Marker Ruler Copyright © 2010 Ryan P. Murphy Paperclip taped
  286. 286. • Simulated data / Answers Mechanical Advantage # of newtons to lift lever Just the weight (_____ grams) No MA 3 Results will vary due to spring scales E arm = 25cm R arm = 5cm 25/5 = 5 .5 E arm = 20cm R arm = 10cm 20/10 = 2 1 E arm = 15cm R arm = 15cm 15/15 = 1 2 E arm = 10cm R arm = 20cm 10/20 = .5 4 E arm = 5cm R arm = 25cm 5/25 = .2 8 Copyright © 2010 Ryan P. Murphy
  287. 287. Mechanical Advantage # of newtons to lift lever Just the weight (_____ grams) No MA 3 Results will vary due to spring scales E arm = 25cm R arm = 5cm 25/5 = 5 .5 E arm = 20cm R arm = 10cm 20/10 = 2 1 E arm = 15cm R arm = 15cm 15/15 = 1 2 E arm = 10cm R arm = 20cm 10/20 = .5 4 E arm = 5cm R arm = 25cm 5/25 = .2 8 Copyright © 2010 Ryan P. Murphy
  288. 288. Mechanical Advantage # of newtons to lift lever Just the weight (_____ grams) No MA 3 Results will vary due to spring scales E arm = 25cm R arm = 5cm 25/5 = 5 .5 E arm = 20cm R arm = 10cm 20/10 = 2 1 E arm = 15cm R arm = 15cm 15/15 = 1 2 E arm = 10cm R arm = 20cm 10/20 = .5 4 E arm = 5cm R arm = 25cm 5/25 = .2 8 Copyright © 2010 Ryan P. Murphy Note Mechanical Disadvantage
  289. 289. • Simple Machines Available Sheet: Levers
  290. 290. • Questions / Follow-up (Use data in MA or in newtons) – Which fulcrum position (Crayola marker) gave you the best MA or lowest number of Newtons? – Which fulcrum position (marker) gave you the least MA or negative MA or highest number of Newtons? – How does changing the fulcrums location effect the lever? Copyright © 2010 Ryan P. Murphy
  291. 291. • Questions / Follow-up (Use data in MA or in newtons) – Which fulcrum position (Crayola marker) gave you the best MA or lowest number of newtons? – Which fulcrum position (marker) gave you the least MA or negative MA or highest number of newtons? – How does changing the fulcrums location effect the lever? Copyright © 2010 Ryan P. Murphy
  292. 292. • Questions / Follow-up (Use data in MA or in newtons) – Which fulcrum position (Crayola marker) gave you the best MA or lowest number of newtons? – Which fulcrum position (marker) gave you the least MA or negative MA or highest number of newtons? – How does changing the fulcrums location effect the lever? Copyright © 2010 Ryan P. Murphy
  293. 293. • Questions / Follow-up (Use data in MA or in newtons) – Which fulcrum position (Crayola marker) gave you the best MA or lowest number of newtons? – Which fulcrum position (marker) gave you the least MA or negative MA or highest number of newtons? – How does changing the fulcrums location effect the lever? Copyright © 2010 Ryan P. Murphy
  294. 294. • Questions / Follow-up (Use data in MA or in newtons) – Which fulcrum position (Crayola marker) gave you the best MA or lowest number of newtons? Copyright © 2010 Ryan P. Murphy
  295. 295. • Questions / Follow-up (Use data in MA or in newtons) – Which fulcrum position (Crayola marker) gave you the best MA or lowest number of newtons? – Answer: The lever had the highest Mechanical Advantage when it had a long effort arm, and short resistance arm (E=25, R=5) Copyright © 2010 Ryan P. Murphy
  296. 296. • Questions / Follow-up (Use data in MA or in newtons) – Which fulcrum position (Crayola marker) gave you the best MA or lowest number of newtons? – Answer: The lever had the highest Mechanical Advantage when it had a long effort arm, and short resistance arm (E=25, R=5) Copyright © 2010 Ryan P. Murphy
  297. 297. • Questions / Follow-up (Use data in MA or in newtons) – Which fulcrum position (Crayola marker) gave you the best MA or lowest number of newtons? – Answer: The lever had the highest Mechanical Advantage when it had a long effort arm, and short resistance arm (E=25, R=5) Copyright © 2010 Ryan P. Murphy
  298. 298. • Questions / Follow-up (Use data in MA or in newtons) – Which fulcrum position (marker) gave you the least MA or negative MA or highest number of newtons? Copyright © 2010 Ryan P. Murphy
  299. 299. • Questions / Follow-up (Use data in MA or in newtons) – Which fulcrum position (marker) gave you the least MA or negative MA or highest number of newtons? – Answer: It was most difficult (Least MA) to lift the weight with a short effort arm, and long resistance arm (E=5, R=25) Copyright © 2010 Ryan P. Murphy
  300. 300. • Questions / Follow-up (Use data in MA or in newtons) – Which fulcrum position (marker) gave you the least MA or negative MA or highest number of newtons? – Answer: It was most difficult (Least MA) to lift the weight with a short effort arm, and long resistance arm (E=5, R=25) Copyright © 2010 Ryan P. Murphy
  301. 301. • Questions / Follow-up (Use data in MA or in newtons) – Which fulcrum position (marker) gave you the least MA or negative MA or highest number of newtons? – Answer: It was most difficult (Least MA) to lift the weight with a short effort arm, and long resistance arm (E=5, R=25) Copyright © 2010 Ryan P. Murphy
  302. 302. • Questions / Follow-up (Use data in MA or in newtons) – How does changing the fulcrums location effect the lever? Copyright © 2010 Ryan P. Murphy
  303. 303. • Questions / Follow-up (Use data in MA or in newtons) – How does changing the fulcrums location effect the lever? – Answer: Changing the fulcrum can increase or decrease the effort needed to lift the weight. Copyright © 2010 Ryan P. Murphy
  304. 304. • Questions / Follow-up (Use data in MA or in newtons) – How does changing the fulcrums location effect the lever? – Answer: Changing the fulcrum can increase or decrease the effort needed to lift the weight. The closer the fulcrum was to the weight the easier it was to lift. Copyright © 2010 Ryan P. Murphy
  305. 305. • Questions / Follow-up (Use data in MA or in newtons) – How does changing the fulcrums location effect the lever? – Answer: Changing the fulcrum can increase or decrease the effort needed to lift the weight. The further away the fulcrum, from the weight, the harder it was to lift. Copyright © 2010 Ryan P. Murphy
  306. 306.  Second Class Lever Copyright © 2010 Ryan P. Murphy
  307. 307. • Activity! Charades, what is the common item acted out. –Hint, It’s a second class lever. Copyright © 2010 Ryan P. Murphy
  308. 308. • Activity! Charades, what is the common item acted out. –Hint, It’s a second class lever. Copyright © 2010 Ryan P. Murphy
  309. 309. • Answer, A wheel barrel. Copyright © 2010 Ryan P. Murphy
  310. 310. • Second Class Lever Copyright © 2010 Ryan P. Murphy
  311. 311. • Simple Machines Available Sheet: Levers
  312. 312. • Please use your materials from the first class lever to construct a second class lever. – Feel the difference when you adjust the load.
  313. 313. • Please use your materials from the first class lever to construct a second class lever. – Feel the difference when you adjust the load.
  314. 314. • Please use your materials from the first class lever to construct a second class lever. – Feel the difference when you adjust the load.
  315. 315. • Please use your materials from the first class lever to construct a second class lever. – Feel the difference when you adjust the load.
  316. 316. • Please use your materials from the first class lever to construct a second class lever. – Feel the difference when you adjust the load.
  317. 317. • Please use your materials from the first class lever to construct a second class lever. – Feel the difference when you adjust the load.
  318. 318. • Please use your materials from the first class lever to construct a second class lever. – Feel the difference when you adjust the load.
  319. 319. • Please use your materials from the first class lever to construct a second class lever. – Feel the difference when you adjust the load.
  320. 320. • Please use your materials from the first class lever to construct a second class lever. – Feel the difference when you adjust the load.
  321. 321. • Activity! Second Class Lever. – Set-up your own spreadsheet and conduct your own investigation (collecting data) about second class levers.
  322. 322. • Activity! Second Class Lever. – Set-up your own spreadsheet and conduct your own investigation (collecting data) about second class levers. Be prepared to report your findings to the class.
  323. 323. • Activity! Second Class Lever. – Use the computers to set-up your spreadsheet and graph. Be prepared to report your findings to the class.
  324. 324. • Activity! Second Class Lever. – Answers (General): The (MA) increases as the load is moved closer to the fulcrum / resistance arm decreases and effort arm increases. Be prepared to report your findings to the class.
  325. 325.  Third Class Lever.  Has Mechanical Disadvantage.  Requires more force to lift the load. Copyright © 2010 Ryan P. Murphy
  326. 326.  Third Class Lever.  Has Mechanical Disadvantage.  Requires more force to lift the load. Copyright © 2010 Ryan P. Murphy
  327. 327.  Third Class Lever.  Has Mechanical Disadvantage.  Requires more force to lift the load. Copyright © 2010 Ryan P. Murphy
  328. 328. Fulcrum
  329. 329. Load Fulcrum
  330. 330. Load Fulcrum Effort
  331. 331. • Which is a first, second, and third class lever.? – Please put your finger in the air when the square lights up.
  332. 332. • Which is a first, second, and third class lever.? – Please put your finger in the air when the square lights up.
  333. 333. • Which is a first, second, and third class lever.? – Please put your finger in the air when the square lights up.
  334. 334. • Which is a first, second, and third class lever.? – Please put your finger in the air when the square lights up.
  335. 335. • Which is a first, second, and third class lever.? – Please put your finger in the air when the square lights up.
  336. 336. • Which is a first, second, and third class lever.? – Please put your finger in the air when the square lights up.
  337. 337. • Which is a first, second, and third class lever.? – Please put your finger in the air when the square lights up.
  338. 338. • How many levers can you point out?
  339. 339. • How many levers can you point out?
  340. 340. • How many levers can you point out? Levers: Learn more at… http://www.technologys tudent.com/forcmom/le ver1.htm
  341. 341. • Video! (Optional) – 6 minutes. – Cirque du Soleil and the Lever. – What type of lever is being used? – How is the lever used to perform this act. – http://www.youtube.com/watch?v=l9OYEpC3GWI
  342. 342.  Wedge: An object with at least one slanting side ending in a sharp edge, which cuts materials apart. Copyright © 2010 Ryan P. Murphy
  343. 343.  The mechanical advantage of a wedge can be found by dividing the length of the slope (S) by the thickness (T) of the big end.  What is the MA of the wedge below. Copyright © 2010 Ryan P. Murphy
  344. 344.  The mechanical advantage of a wedge can be found by dividing the length of the slope (S) by the thickness (T) of the big end.  What is the MA of the wedge below? 50 cm 10 cm Copyright © 2010 Ryan P. Murphy
  345. 345. • Answer! 50/10 = Mechanical Advantage 5 50 cm 10 cm Copyright © 2010 Ryan P. Murphy
  346. 346. • What is the MA of this wedge? 20 cm 5 cm
  347. 347. • What is the MA of this wedge? 20 cm 5 cm 20/5 =
  348. 348. • What is the MA of this wedge? 20 cm 5 cm 20/5 = MA 4
  349. 349. • Which wedge below has the greater MA Mechanical Advantage? Copyright © 2010 Ryan P. Murphy
  350. 350. • Which wedge below has the greater MA Mechanical Advantage? Copyright © 2010 Ryan P. Murphy
  351. 351. • Which wedge below has the greater MA Mechanical Advantage? Copyright © 2010 Ryan P. Murphy
  352. 352. • Which wedge below has the greater MA Mechanical Advantage? Copyright © 2010 Ryan P. Murphy
  353. 353. • Simple Machines Available Sheet: Levers
  354. 354. • Activity! (Optional) Mechanical Advantage of a Wedge. – Please trace the wooden blocks and calculate the Mechanical Advantage of each type of wedge.
  355. 355. • Activity! (Optional) Mechanical Advantage of a Wedge. – Please trace the wooden blocks and calculate the Mechanical Advantage of each type of wedge. T S Measure the longest slope on this type of wedge/
  356. 356. • Activity! – On the next slide, your table group must find the MA of 4 different wedges in 60 seconds. – To succeed your group must be organized, precise, and methodical.
  357. 357. Simulated wooden blocks. 3 8 4 20 10 4 6 12
  358. 358. Simulated wooden blocks. 3 8 4 20 10 4 6 12
  359. 359. Simulated wooden blocks. 3 8 4 20 10 4 6 12 MA=2
  360. 360. Simulated wooden blocks. 3 8 4 20 10 4 6 12 MA=2
  361. 361. Simulated wooden blocks. 3 8 4 20 10 4 6 12 MA=2 MA = 6.66
  362. 362. Simulated wooden blocks. 3 8 4 20 10 4 6 12 MA=2 MA = 6.66
  363. 363. Simulated wooden blocks. 3 8 4 20 10 4 6 12 MA=2 MA = 6.66 MA = 2.5
  364. 364. Simulated wooden blocks. 3 8 4 20 10 4 6 12 MA=2 MA = 6.66 MA = 2.5
  365. 365. Simulated wooden blocks. 3 8 4 20 10 4 6 12 MA=2 MA = 6.66 MA = 2.5 MA = 2
  366. 366. • What is our next simple machine?
  367. 367. • What is our next simple machine?
  368. 368. Axle Wheel
  369. 369.  Wheel and Axle: A wheel with a rod, called an axle, through its center lifts or moves a load. Copyright © 2010 Ryan P. Murphy
  370. 370.  Wheel and Axle: A wheel with a rod, called an axle, through its center lifts or moves a load. Copyright © 2010 Ryan P. Murphy The larger circles are the wheels.
  371. 371.  Wheel and Axle: A wheel with a rod, called an axle, through its center lifts or moves a load. Copyright © 2010 Ryan P. Murphy The larger circles are the wheels. The smaller circles are the axles.
  372. 372.  The mechanical advantage of a wheel and axle is the ratio of the radius of the wheel divided by the radius of the axle. Copyright © 2010 Ryan P. Murphy
  373. 373.  The mechanical advantage of a wheel and axle is the ratio of the radius of the wheel divided by the radius of the axle. Copyright © 2010 Ryan P. Murphy
  374. 374.  The mechanical advantage of a wheel and axle is the ratio of the radius of the wheel divided by the radius of the axle. Copyright © 2010 Ryan P. Murphy
  375. 375.  The mechanical advantage of a wheel and axle is the ratio of the radius of the wheel divided by the radius of the axle. Copyright © 2010 Ryan P. Murphy
  376. 376.  The mechanical advantage of a wheel and axle is the ratio of the radius of the wheel divided by the radius of the axle. Copyright © 2010 Ryan P. Murphy
  377. 377.  The mechanical advantage of a wheel and axle is the ratio of the radius of the wheel divided by the radius of the axle. Copyright © 2010 Ryan P. Murphy
  378. 378.  The mechanical advantage of a wheel and axle is the ratio of the radius of the wheel divided by the radius of the axle. Copyright © 2010 Ryan P. Murphy What is the MA?
  379. 379.  The mechanical advantage of a wheel and axle is the ratio of the radius of the wheel divided by the radius of the axle. Copyright © 2010 Ryan P. Murphy What is the MA? 5/1 =
  380. 380.  The mechanical advantage of a wheel and axle is the ratio of the radius of the wheel divided by the radius of the axle. Copyright © 2010 Ryan P. Murphy What is the MA? 5/1 = MA 5
  381. 381.  Radius: A straight line from a circles center to its perimeter.
  382. 382. • Diameter: The length of a straight line passing through the center of a circle and connecting two points on the circumference.
  383. 383. • Diameter: The length of a straight line passing through the center of a circle and connecting two points on the circumference. Diameter
  384. 384. • Diameter: The length of a straight line passing through the center of a circle and connecting two points on the circumference. Diameter
  385. 385. • What is the MA of this wheel below? r=60 cm r=3 cm Copyright © 2010 Ryan P. Murphy
  386. 386. • MA = 20 r=60 cm r=3 cm Copyright © 2010 Ryan P. Murphy
  387. 387. 1.25 m .5 m “The MA is not 2.5, it’s 5.5”
  388. 388. 1.25 m .5 m “Dude, She’s right, the MA is 2.5”
  389. 389. 1.25 m .5 m “Yah, but… Arggh”
  390. 390. • Note how this mousetrap car is using a wheel that would have a high mechanical advantage. 15 cm .5 cm
  391. 391. • Note how this mousetrap car is using a wheel that would have a high mechanical advantage. 15 cm .5 cm 15/.5 =
  392. 392. • Note how this mousetrap car is using a wheel that would have a high mechanical advantage. 15 cm .5 cm 15/.5 = MA 30
  393. 393. Wheel and Axle, Mechanical Advantage. Learn more at… http://en.wikipedia.org/wiki/Wheel_and_axle
  394. 394. • Activity! Trace an old compact disc into your science journal and pretend it is a wheel and axle. (Crayola Marker is Axle) – Find the Mechanical Advantage of this wheel and axle.
  395. 395. • Activity! Trace an old compact disc into your science journal and pretend it is a wheel and axle. (Crayola Marker is Axle) – Find the Mechanical Advantage of this wheel and axle.
  396. 396. • Activity! Trace an old compact disc into your science journal and pretend it is a wheel and axle. (Crayola Marker is Axle) – Find the Mechanical Advantage of this wheel and axle.
  397. 397. • Activity! Trace an old compact disc into your science journal and pretend it is a wheel and axle. (Crayola Marker is Axle) – Find the Mechanical Advantage of this wheel and axle. Wheel radius = 5.2 cm
  398. 398. • Activity! Trace an old compact disc into your science journal and pretend it is a wheel and axle. (Crayola Marker is Axle) – Find the Mechanical Advantage of this wheel and axle. Wheel radius = 5.2 cm
  399. 399. • Activity! Trace an old compact disc into your science journal and pretend it is a wheel and axle. (Crayola Marker is Axle) – Find the Mechanical Advantage of this wheel and axle. Wheel radius = 5.2 cm Axle radius = .75 cm
  400. 400. • Activity! Trace an old compact disc into your science journal and pretend it is a wheel and axle. (Crayola Marker is Axle) – Find the Mechanical Advantage of this wheel and axle. 5.2 / .75 = MA Wheel radius = 5.2 cm Axle radius = .75 cm
  401. 401. • Activity! Trace an old compact disc into your science journal and prete