6. Which would have the greatest gravitational potential energy?
A. A 4 lb rat on a school desk
B. A 45 lb dog in an oak tree
C. A 14 pound platypus on a swing
D. A 45 lb child on a bike

7. Which is the best example that something has kinetic energy?
A. A car parked on a steep hill
B. A tennis ball rolling across the court
C. A picture hanging on the wall
D. A piece of coal before it's burned

8.
is the ability to cause change.
A. Energy
C. Friction
B. Force
D. Motion

9. The potential energy of a box on a shelf, relative to the floor, is a measure of
A. The work is done by putting the box on the shelf from the floor.
B. The weight of the box times the distance above the floor.
C. The energy the box has because of its position above the floor.
D. All of the above

10. A stationary object may have a
A. Potential energy
C. Kinetic energy
B. Velocity
D. Acceleration​