A-LevelPhysicsDynamics9702/12 · May/June 2017 · Q71 Mark
A rubber ball is dropped onto a table and bounces back up. The table exerts a force F on the ball. Which graph best shows the variation with time t of the force F for the short time that the ball is in contact with the table?
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Agraph showing force F increasing linearly with time t from 0, then decreasing linearly to 0.
Bgraph showing force F increasing from 0, curving upwards, reaching a maximum, then curving downwards and decreasing to 0.
Cgraph showing force F increasing from 0, curving downwards, reaching a maximum, then curving upwards and decreasing to 0.
Dgraph showing force F increasing linearly with time t from 0, then decreasing linearly to 0, but with a sharper peak.
✓ Correct answer
C: graph showing force F increasing from 0, curving downwards, reaching a maximum, then curving upwards and decreasing to 0.
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