Physics (AS & A Level) · May / June 2022 · Paper 13 · Question 9

A ball is dropped onto horizontal ground and bounces vertically upwards. When the ball is in contact with the ground, the following forces act: • the weight W of the ball • the contact force P exerted on the ground by the ball • the contact force N exerted on the ball by the ground. When the ball is in contact with the ground, the ball is momentarily stationary. At this instant, which relationship is correct?

1. AN = P + W
2. BN > P + W
3. CN = W
4. DN > W

As printed in the paper