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MHT CET Physics question

PhysicsWork, Energy and PowerMHT CET

If the radius of the circular path and frequency of revolution of a particle of mass 'm' are doubled then the change in its kinetic energy will be ( and are the initial and final kinetic energies of the particle respectively) [MHT-CET 2019]

Answer: (B)

Solution

, so doubling both gives and the change is

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Question ID VK-039557