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JEE Main 2002 Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main 2002

Initial angular velocity of a circular disc of mass M is . Then two small spheres of mass m are attached gently to diametrically opposite points on the edge of the disc. What is the final angular velocity of the disc?

Answer: (3)

Solution

No external torque acts, so angular momentum is conserved: . Initially . Each small sphere at the rim adds , so . Hence $ω_2 =

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Question ID VK-037851