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MHT CET Physics question

PhysicsWork, Energy and PowerMHT CET

A mass attached to one end of a string crosses top-most point on a vertical circle with critical speed. Its centripetal acceleration when string becomes horizontal will be (g = gravitational acceleration) [MHT-CET 2023, MHT-CET 2023]

Answer: (B)

Solution

At the top ; at the horizontal position , so

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Question ID VK-040847