A-LevelPhysicsDynamics9702/12 · Feb/Mar 2021 · Q81 Mark
A ball strikes a horizontal surface with momentum p at an angle θ to the surface, as shown. [Figure 8.1] The ball rebounds with the same magnitude of momentum at an angle θ to the surface. The ball is in contact with the surface for time t. What is the magnitude of the average resultant force acting on the ball during the collision?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Azero
B2p / t
C2pcosθ / t
D2psinθ / t
✓ Correct answer
D: 2psinθ / t
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