A thin uniform rod, pivoted at `O`, is rotating in the horizontal plane with constant angular speed `omega`, as shown in the figure. At tune `t = 0`, a small insect starts from `O` and moves with constant speed `v` with respect to the rod towards the other end. It reaches the end of the rod at `t = T` and stops. The angular speed of the system remains `omega` throughout. The magnitude of the torque (`tau`) on the system about `O`, as a function of time is best represented by which plot?

Options

A.
B.
C.
D.

Answer

B