Among the four graphs, there is only one graph for which average velocity over the time interval (0, T) can vanish for a suitably chosen T. Which one is it?

Options

A.
B.
C.
D.

Answer

B

Explanation

In graph (b) from for one value of displacement there are two different points of time. Hence, for one time, the average velocity is positive and for other time is equivalent negtive. As there are opposite velocity in the interval 0 to T hence average velocity can vansih in (b). This can be seen in the figure alongside. Here, OA=BT (same displacement) for two different point of time.