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MHT CET Physics question

PhysicsWork, Energy and PowerMHT CET

A mass is attached to the end of a rod of length . The mass goes along a vertical circular path with the other end, hinged at its centre. What should be the minimum speed of mass at the bottom of this circular path?

Answer: (A)

Solution

A rod can supply a push, so the mass only needs to reach the top with zero speed: $Missing argument for \frac\frac=mg(2l)⇒

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Question ID VK-040676