Question

In the following figure  shows x-t graph of a particle. Find the time t such that the average velocity of the particle during the period 0 to t is zero.

Answer 1

Consider point B₁ at 12 s.

At t = 0 s, S = 20 m and at t = 12 s, S = 20 m.
For the time interval 0–12, change in the displacement is zero.

\[\text{ Average velocity }  = \frac{\text{ Displacement } }{\text{ Time } } = 0\]

Hence, the time is 12 seconds.