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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

Two wheels and are mounted on the same axle. Moment of inertia of is 6 kg·m² and it is rotating at 600 rpm when is at rest. What is the moment of inertia of , if their combined speed is 400 rpm?

Answer: (C)

Solution

Angular momentum conservation: . In rpm units:

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Question ID VK-158721