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Q.

A massless string passes around a frictionless pulley whose axis is horizontal. A monkey holds on to one end of the string and a body with the same mass as the monkey is attached to the other end. The monkey starts climbing upwards with an acceleration a. Then the other body moves

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a

upward with an acceleration a

b

downward with a uniform velocity

c

upward with an acceleration a/2

d

downward with an acceleration a

answer is C.

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Detailed Solution

For monkey T-mg=maT=m(g+a).

So, same tension acts on the body on the other side, T-mg=ma

So the other body also moves with an acceleration of a upwards.

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