A thin uniform rod, pivoted at \( O \), is rotating in the horizontal plane with constant angula...

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A thin uniform rod, pivoted at \( O \), is rotating in the horizontal plane with constant angular speed \( \omega \), as shown in the figure. At time \( t=0 \), a small insect starts from \( O \) and moves with constant speed \( v \) with respect to the rod towards the other
P end. It reaches the end of the rod at \( t=T \) and stops. The

W angular speed of the system remains \( \omega \) throughout. The magnitude of the torque \( (\vec{\tau}) \) on the system about \( O \), as a function of time is best represented by which plot?
\( (1) \)
(2)
(3)
(4)
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