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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

A solid cylinder of mass 20 kg rotates about its axis with angular speed . The radius of the cylinder is 0.25 m. What is the kinetic energy associated with the rotation of the cylinder? What is the magnitude of angular momentum of the cylinder about its axis?

Answer: (B)

Solution

I = (1/2)(20)(0.25)² = 0.625 kg m²; KE = (1/2)I ω² = (1/2)(0. = 3125 J and L = I ω

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Question ID VK-040772