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A heavy ring fo mass m is clamped on the...

A heavy ring fo mass m is clamped on the periphery of a light circular disc.A small particle having equal mass is clamped at the centre of the disc. The system is rotated in such a way that the centre of mass moves in a circle of radius r with a uniform speed v. We conclude that an external forec :

A

`(mv^2)/r` must be acting on the central particle

B

`(2mv^2)/r` must be acting on the central particle

C

`(2mv^2)/r` must be acting on the system

D

`(2mv^2)/r` must be acting on the ring

Text Solution

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The correct Answer is:
C
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