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 ?

• A

  120 N, √10 sec

• B

  132 N, √10 sec

• C

  153 N, √10 sec

• D

  165 N, √10 sec