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JEE Main Physics question

PhysicsWork, Energy and PowerJEE Main

A mass m is attached to the end of a rod of length l. The mass goes around a vertical circular path with the other end hinged at the centre. What should be the minimum velocity of the mass at the bottom of the circle, so that the mass completes the circle?

Answer: (C)

Solution

At the topmost point, the minimum condition (string/rod tension ≥ 0, here a rigid rod allows the weaker condition ≥ 0, but the standard "just completes the

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Question ID VK-153573