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Physics (AS & A Level) · May / June 2016 · Paper 12 · Question 7

9702Non-uniform motion

A tennis ball is released from rest at the top of a tall building. Which graph best represents the variation with time t of the acceleration a of the ball as it falls, assuming that the effect of air resistance is not negligible?

  1. AGraph A: a decreases from a maximum value towards zero as t increases
  2. BGraph B: a decreases from a maximum value and tends to a non-zero constant as t increases
  3. CGraph C: a increases from zero towards a constant value as t increases
  4. DGraph D: a is constant as t increases

As printed in the paper

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Correct answer: A. Graph A: a decreases from a maximum value towards zero as t increases

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