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A block of mass M with a semicircualr of...

A block of mass M with a semicircualr of radius R, rests on a horizontal frictionless surface. A uniform cylinder of radius r and mass m is released from rest the top point A The cylinder slips on the semicircular frictionless track. How far has the block moved when the cylinder reaches the bottom (point B) of the track ? How fast is the block moving when the cylinder reaches the bottom of the track?

A

`(M(R-r))/(M+m)`

B

`(m(R-r))/(M+m)`

C

`((M+m)R)/(M)`

D

None of these

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