Q45 / 54 · KVPY 2017 (5 Nov SA) · Physics

A ball is dropped vertically from heigth $\mathrm{h}$ and is bouncing elastically on the floor (see figure). Which of the following plots best depicts the acceleration of the ball as a function of time.

A
Correct answer
B
C
D

Solution

Acceleration is all the time $(-\mathrm{g})$ except at the time of collision it is impulsive force in (+)ve decrease.

Hence, the correct answer is option: 'B'.

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