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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

A thin rod of mass 'm' and length '2l' is made to rotate about an axis passing through its centre and perpendicular to its plane. Its angular velocity changes from 'zero' to 'ω' in time 't'. The torque acting on the rod is [MHT-CET 2020, MHT-CET 2020]

Answer: (C)

Solution

and , so ; (a) uses

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Question ID VK-040994