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Q.

A monkey of mass 15 kg is climbing on a rope with one end fixed to the ceiling. If it wishes to go up with an acceleration of 1 m/s2, how much force should it apply to the rope ? If the rope is 5 m long and the monkey starts from rest, how much time will it take to reach the ceiling ?

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a

120 N, √10 sec

b

132 N, √10 sec

c

165 N, √10 sec

d

153 N, √10 sec

answer is D.

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Detailed Solution

T = M(g + a) = 15(10 + 1) = 165 N
 

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