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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

A disc of mass 2 kg and radius 0.2 m is rotating with angular velocity . What is angular velocity, if a mass of 0.25 kg is put on periphery of the disc?

Answer: (A)

Solution

Angular momentum is conserved: , i.e.

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Question ID VK-040728