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Physics (AS & A Level) · Oct / Nov 2021 · Paper 12 · Question 9

9702Momentum and Newton’s laws of motion

The diagram shows two parachutists, X and Y, moving vertically downwards. The total mass of parachutist Y and his parachute is twice the total mass of parachutist X and his parachute. At this moment, the air resistance on parachute Y is twice the air resistance on parachute X. Neither parachutist has reached his constant (terminal) velocity. Which statement describes the acceleration of Y compared with the acceleration of X?

  1. AThe acceleration of Y is half the acceleration of X.
  2. BThe acceleration of Y is the same as the acceleration of X.
  3. CThe acceleration of Y is more than the acceleration of X, but less than twice the value.
  4. DThe acceleration of Y is twice the acceleration of X.

As printed in the paper

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Correct answer: B. The acceleration of Y is the same as the acceleration of X.

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