Question

A ball is released from rest above a horizontal surface. The graph shows the variation with time of its velocity (not to scale). The scale on this graph is changed at every impact. A, B, C, D and E represent areas. Which of the following are correct?

• A. A = B & B = C
• B. A = C & C = E
• C. B = C & D = E
• D. all of the above

Answer 1

The correct option is C B = C & D = E

Area under velocity time graph gives displacement.

After an impact, the ball rises up an then falls down by the same distance. But the distances after consecutive impacts will be different. So $B=C$ and $D=E$

and $C>D$.