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Q.

A 20kg monkey has a firm hold on a light rope that passes over a frictionless pulley and is attached to a 20kg bunch of bananas. The monkey looks upward, sees the bananas and starts to climb the rope to get them. As the monkey climbs, does the distance between the monkey and the bananas decrease, increase or remain constant?

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a

Distance changes

b

Distance will not change

c

None of the above

d

All of the above

answer is A.

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Detailed Solution

 Force diagram on both sides is always similar Therefore motion of both sides is always similar For example, if monkey accelerates upwards, then T>20 g. But same T is on RHS also.

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Therefore, bananas also accelerate upwards.

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