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On the centre of a frictionless table, a...

On the centre of a frictionless table, a small hole is made, through which a weightless string of lenth 2l is inserted. On the two ends of the strings, two balls of the same mass m are attached, Arrangement is made in such a way that half of the string is on the table top and half is hanging below. The ball on the table top is made to move in a circular path with a constant speed v, What is the centripetal acceleration of the moving ball?

A

mvl

B

g

C

zero

D

2 mvl

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