The document discusses concepts of work, energy, forces, and matter. It defines work as a force acting through a distance, or work equals force multiplied by distance. It also discusses the difference between weight, which is the force of gravity on an object, and mass. Weight equals mass multiplied by the acceleration due to gravity. The document suggests that going straight up a mountain would require more work than taking a longer scenic route, since work is the product of the force applied and the distance traveled.

1. WORK andWORK and
ENERGYENERGY

2. Working with Forces
FORMULAE
F = MA
W= mg
M = F/A
A = F/M
Constant:
Acceleration
due to gravity
9.8 m/sec/sec

3. MATTER
The stuff that makes up all things is called matter.
Matter is defined as anything which:
takes up space and has mass.
Amount of substance in an
object

4. Click on this link:
http://www.youtube.com/watch?v
=grWG_U4sgS8&feature=related
Weight Vs. Mass

5. Weight and Mass
Weight is a measure of the
force of gravity on an object
Weight = Mass x acceleration
due to gravity
w= mg

6. m
w
g
W = m x g
M = w /g

7. Mass kilograms
Acceleration m/sec/sec
force newton (N)
1N = 1 kg x 1 m/sec/sec
Unit of Force

8. Work
Click on this link:
http://www.youtube.com/watch?v=IvcOYOO0Fvw&feature=related

9. WORKWORK
A force acting
through a distance
Work = Force x Distance

10. FORCE
DISTANCE
Work = force x distance
W = F d
Work = F (N) x D (m)
= Newton-meter or joule (J)

11. WORKWORK
A force acting
through a distance
Work = Force x Distance

12. FORCE
DISTANCE
Work = force x distance
W = F d
Work = F (N) x D (m)
= Newton-meter or joule (J)

13. Do you do more work
going straight up a
mountain or taking the
longer scenic route
around to the top?
A
B
Work = Force (N) x D (m)
or W= Fd
“Kennon or Marcos Road?"

14. Title/Aim: Do you do more work going straight up a
mountain or taking the longer scenic route around to the top?
Hypothesis
Variables
Procedure
Blank Tables

15. Table showing effect of Distance on Force
Distance
D/m
Force of Car F/N
Work
W= F x DTrial 1 Trial 2 Trial 3 Average
0.5
0.6
0.7
0.8
0.9
1.0

16. SUMMARY OF CONCEPTS:
•If h is doubled, the GPE is doubled.
If H is tripled, the GPE is also tripled.
•If speed (velocity) is doubled (2x), the Kinetic Energy
increases (4x or 22
).
If speed (velocity) is tripled (3X), the KE increases 9x or 32
.
• The GPE at the top changes to KE at the bottom.
GPE = w x h or
GPE = mgh