2. Ch. 10 , Lesson 5
( Levers and pulleys )
• How can you make work
easier?
•
Is a tool that makes work
easier to do.
What machines do?
can change the direction of
force you need to do work.
Vocabulary:
Machine
Simple machines
Lever
Wheel and axle
pulley
Objectives:
I will be able to know:
Levers and pulleys are
machines make work
easier.
2
machine
1
3. Ch. 10 , Lesson 5
( Levers and pulleys )
• some machines change both
the direction and amount of
force you need to do work.
•
• machine can change the
amount of force you need to do
work.
Vocabulary:
Machine
Simple machines
Lever
Wheel and axle
pulley
Objectives:
I will be able to know:
Levers and pulleys are
machines make work
easier.
3
2
3
4. Ch. 10 , Lesson 5
( Levers and pulleys )
• A machine with few or no
moving parts.Vocabulary:
Machine
Simple machines
Lever
Wheel and axle
pulley
Objectives:
I will be able to know:
Levers and pulleys are
machines make work
easier.
4
Simple machine
6. Ch. 10 , Lesson 5
( Levers and pulleys ) Is a straight bar that moves
on a fixed point.
All levers have 3 important
points.
• Load fulcrum force
Vocabulary:
Machine
Simple machines
Lever
Wheel and axle
pulley
Objectives:
I will be able to know:
Levers and pulleys are
machines make work
easier.
6
Lever1
7. Ch. 10 , Lesson 5
( Levers and pulleys )
load the object being
lifted or moved.
force the push or pull
that moves the lever.
fulcrum the point
where the lever turns.
Vocabulary:
Machine
Simple machines
Lever
Wheel and axle
pulley
Objectives:
I will be able to know:
Levers and pulleys are
machines make work
easier.
7
A
B
C
8. Ch. 10 , Lesson 5
( Levers and pulleys )
• Are there different kinds
of Levers?
• There are 3 types according to
arrange of force, fulcrum and
load.
Vocabulary:
Machine
Simple machines
Lever
Wheel and axle
pulley
Objectives:
I will be able to know:
Levers and pulleys are
machines make work
easier.
8
1-the fulcrum is
between the force and
the load .
Ex. pliers
2-the force is between
the fulcrum and the
load .
Ex. Baseball bat
3-the load is between
the force and the
fulcrum
Ex. wheelbarrow
9. wheel and axle
• ex: doorknob
• wheel=knob
• axle=post that
attaches to its
center
10. Ch. 10 , Lesson 5
( Levers and pulleys ) It has a wheel that turns on
a post.
The post is called axle
Vocabulary:
Machine
Simple machines
Lever
Wheel and axle
pulley
Objectives:
I will be able to know:
Levers and pulleys are
machines make work
easier.
10
Wheel and axle2
11. Ch. 10 , Lesson 5
( Levers and pulleys )
It makes work easier by
change strength of the
turning force.
The wheel turns a long
distance , the axle turns a
short distance.
Vocabulary:
Machine
Simple machines
Lever
Wheel and axle
pulley
Objectives:
I will be able to know:
Levers and pulleys are
machines make work
easier.
11
12. Ch. 10 , Lesson 5
( Levers and pulleys )
Other examples for wheel
and axle:
A windlass a bucket tied to
a rope to raise water from a
well.
Vocabulary:
Machine
Simple machines
Lever
Wheel and axle
pulley
Objectives:
I will be able to know:
Levers and pulleys are
machines make work
easier.
12
14. Ch. 10 , Lesson 5
( Levers and pulleys ) It uses a wheel and a rope to
lift a load.
You pull down to lift up.
Vocabulary:
Machine
Simple machines
Lever
Wheel and axle
pulley
Objectives:
I will be able to know:
Levers and pulleys are
machines make work
easier.
14
pulley3
15. Ch. 10 , Lesson 5
( Levers and pulleys )
We have 2 kinds of pulleys
One-wheel two-wheel
Pulley pulley
The force less force is
And load needed to
Are equal move load
Vocabulary:
Machine
Simple machines
Lever
Wheel and axle
pulley
Objectives:
I will be able to know:
Levers and pulleys are
machines make work
easier.
15
