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in Properties of solids and liquids by (79.8k points)
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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 always have momenta of the same magnitude. 

(C) When the string becomes vertical, the speed of R and B will be directly proportionaly to their masses 

(D) R will lose contact with the rod at some point

1 Answer

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by (71.7k points)
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Best answer

Correct option (A) One point in the string will have only vertical motion

Explanation:

COM will remain constant in x direction 

COM will move in y direction

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