The document contains a diagram showing two balls, one hollow and white and one solid and black, at positions A and B on a hill. It asks 6 multiple choice questions about the kinetic energy of the balls at different positions. The questions can be answered by considering that kinetic energy depends on mass and speed, and the balls will have more kinetic energy rolling downhill at position B than uphill at position A.

1. Use this diagram to answer the following questions. The balls are
not moving at position “A”, But they are moving at position
“B”. They are made of the same material.
1. Where does the hollow, white ball have most
KE?
2. Where does the hollow, white ball have the
least KE?
3. Where does the solid, black ball have most
KE?
4. Where does the solid, black ball have least
KE?
5. Do the two balls at the top of the hill have
the same amount of KE?
6. Do the two balls at the bottom of the hill
have the same amount of KE?
A
B
Surface of the Earth
B
A
B
A
Yes, zero Joules
No

2. Review
•Kinetic Energy
•Affected by mass
and speed

3. Changing the Mass
0
0.2
0.4
0.6
0.8
1
1.2
1.4
0 0.2 0.4 0.6 0.8 1 1.2
Mass (kg)
KE(J) Kinetic Energy

4. Kinetic Energy
Changing the Speed
0
5
10
15
20
25
30
35
0 2 4 6 8 10 12
Speed (m/s)
KE(J)

5. Elastic Potential EnergyElastic Potential Energy
•The energy stored in a
stretched or compressed
elastic material

6. Elastic Potential EnergyElastic Potential Energy
•The energy stored in a
stretched or compressed
elastic material