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A uniform disc of mass M and radius R is...

A uniform disc of mass M and radius R is initially at rest. Its axis is fixed through O. A block of mass m is moving with speed `v_(1)` on a frictionless surface passes over the disc to the dotted position. On coming in contact with the disc, it slips on it. The slipping ceases before the block loses contact with the disc, due to the high friction. Now, the velocity of mass m is

A

`v_(2)=v_(1)/(1+(M//2m))`

B

`v_(2)=v_(1)/(2M)`

C

`v_(2)=v_(1)/(1+(M//m))`

D

`v_(2)=2v_(1)`

Text Solution

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The correct Answer is:
A
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