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 1 m/s $^{2}$ , how much force should it apply to the rope if rope is 5 m long and the monkey starts from rest?

150 N

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> 160 N

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165 N

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150 < T

\leq

160 N

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Solution

The correct option is C 165 N
$T - m g = m a \Rightarrow T = m (g + a) = 15 \times 11 = 165 N$

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