A boy holds a 40-N weight at arm's length for 10 s.His arm is 1.5 m above the ground.The work done by the force of the boy on the weight while he is holding it is:

Question

Quizplus · Accepted Answer

The work done by the force of the boy on the weight is zero since the weight is not displaced in any direction. Work is defined as a force applied over a displacement. In this case, the weight is held stationary at arm's length, so there is no displacement and therefore no work done.

A Boy Holds a 40-N Weight at Arm's Length for 10