A-LevelPhysicsDynamics9702/12 · May/June 2012 · Q161 Mark
A sphere is released from rest in a viscous fluid. Which graph represents the variation with time t of the acceleration a of the sphere?
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AAn acceleration-time graph starting at a positive maximum and increasing linearly with time.
BAn acceleration-time graph starting at a positive maximum and increasing non-linearly with time, curving upwards.
CAn acceleration-time graph starting at a positive maximum and decreasing linearly with time, reaching zero.
DAn acceleration-time graph starting at a positive maximum and decreasing exponentially with time, approaching zero.
✓ Correct answer
D: An acceleration-time graph starting at a positive maximum and decreasing exponentially with time, approaching zero.
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