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The ring R in the arrangement shown can ...

The ring R in the arrangement shown can slide along a smooth, fixed, horizontal rod XY. It is attached to the block B by a light string. The block is released from rest, with the string horizontal

A

One point in the string will have only vertical motion

B

R and B will have momenta of the same magnitude.

C

When the string becomes vetical , the speed of R and B Will be directly propertionaly to their masses

D

R will lose constant with the rod at some point

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The correct Answer is:
A
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