A-LevelPhysicsDynamics9702/12 · May/June 2016 · Q71 Mark
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?
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Agraph showing acceleration starting at a positive maximum at t=0 and decreasing, tending towards zero over time.
Bgraph showing acceleration starting at a positive maximum at t=0 and decreasing, tending towards a constant non-zero positive value over time.
Cgraph showing acceleration starting at zero at t=0 and increasing, tending towards a constant non-zero positive value over time.
Dgraph showing a constant positive acceleration from t=0.
✓ Correct answer
A: graph showing acceleration starting at a positive maximum at t=0 and decreasing, tending towards zero over time.
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