Monkey and RopeHardQuestion 30246
Question
A monkey of mass 20 kg holds a rope that goes over a pulley to a 20 kg counterweight. To climb up, the monkey must pull the rope with a force:
- ALess than 200 N
- BEqual to 200 N
- CMore than 200 NCorrect
- DZero
Correct answer
More than 200 N
Explanation
For the monkey to accelerate upward, tension T > mg = 200 N. The same tension T pulls the counterweight up. If T > 200 N, both accelerate upward — monkey's effort exceeds the weight.