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JEE Main Physics question

PhysicsWork, Energy and PowerJEE Main

A body slides down a frictionless track which ends in a circular loop of diameter . The minimum height of the body (above the bottom of the loop), in terms of , so that it may just complete the loop, is

Answer: (C)

Solution

For just completing the loop, the speed at the top must satisfy . By energy conservation

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Question ID VK-157763