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A thin uniform rod, pivoted at O, is rot...

A thin uniform rod, pivoted at O, is rotating in the horizontal plane with constatn angular speed `omega`, as shown in the figure. At time t = 0, a small insect starts from O and moves with constant sped 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 `(|vecpi|)` about O, as a function of time is best represented by which plot?

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