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Question: In a circus stuntman rides a motorbike in a circular track of radius \(R\) in the vertical plane. Th...

In a circus stuntman rides a motorbike in a circular track of radius RR in the vertical plane. The minimum speed at highest point of track will be

A

2gR\sqrt{2gR}

B

2gR2gR

C

3gR\sqrt{3gR}

D

gR\sqrt{gR}

Answer

gR\sqrt{gR}

Explanation

Solution

Minimum speed at the highest point of vertical circular path v=gRv = \sqrt{gR}