Physics (AS & A Level) · Oct / Nov 2020 · Paper 13 · Question 16

A ball drops onto a horizontal surface and bounces elastically. What happens to the kinetic energy of the ball during the very short time that it is in contact with the surface?

1. AMost of the kinetic energy is lost as heat and sound.
2. BThe kinetic energy decreases to zero and then returns to its original value.
3. CThe kinetic energy remains constant because it is an elastic collision.
4. DThe kinetic energy remains constant in magnitude but changes direction.

As printed in the paper