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JEE Main Physics question

PhysicsLaws of MotionJEE Main

A particle of mass rotates on a smooth horizontal table in a circle of radius , the string passing through a hole at the centre of the table and supporting a hanging mass below. The speed of rotation of required to keep steady (stationary) is

Answer: (A)

Solution

For to remain steady, the string tension equals . This same tension supplies

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Question ID VK-157575