Question

when does a force do work?​

Answer 1

Answer:

A force is said to do work when it acts on a body so that there is a displacement of the point of application in the direction of the force. Thus, a force does work when it results in movement. in this relation Fa is the force acted upon spring by the object.

Answer 2

Force does work when it results in the movement of a body.

Hope it helps.