Question
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, how much force should it apply to the rope if rope is 5 m long and the monkey starts from rest?
150 N
> 160 N
165 N
150 < T ≤ 160 N
Solution
C.
165 N
The mass of monkey = 15 kg
Acceleration a = 1 m/s2
For the motion of the monkey T [ 15 g + 15 (1) ]
Hence, T is tension in the string T = 15 g + 15
T = 15 ( 10 + 1)
= 15 × 11
T = 165 N
The monkey should apply 165 N force to the rope.
