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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

Four balls, each of radius 10 cm and masses 1 kg, 2 kg, 3 kg and 4 kg, are attached to the periphery of a massless plate of radius 1 m. What is the moment of inertia of the system about the centre of the plate (treating balls as solid spheres of radius 0.1 m)?

Answer: (B)

Solution

Each ball (solid sphere) contributes (own spin + parallel axis to plate centre), with m,

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Question ID VK-158475