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NEET 2010 Physics question

PhysicsSystems of Particles and Rotational MotionNEET 2010

A thin circular ring of mass and radius is rotating about its axis with constant angular velocity . Two objects each of mass are attached gently to the opposite ends of a diameter of the ring. The ring now rotates with angular velocity given by

Answer: (4)

Solution

No external torque acts about the axis, so angular momentum is conserved: . Initially ; finally . Hence $ω_2 =

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Question ID VK-090363