# A particle of mass  is rigidly attached at ‘ ’ to a ring of mass  and radius ‘ ’. The system is released from rest and rolls without sliding. The angular acceleration of ring just after release is a) b) c) d)

## Question ID - 100183 :- A particle of mass  is rigidly attached at ‘ ’ to a ring of mass  and radius ‘ ’. The system is released from rest and rolls without sliding. The angular acceleration of ring just after release is a) b) c) d)

3537

(b)

The distance of CM from the ring centre

We can apply torque equation about point of contact as the ring is rolling

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

a)b)c)d)