Assertion : When the force retards the motion of a body, the work done is zero.
Reason : Work done depends on angle between force and displacement.
Which of the following option(s) is correct ?
Answer & explanation
Correct answer: option 4
- When the force retards the motion of a body, the work done is NOT zero but negative as the force is still in action and the body covers a finite distance before coming to rest.
- Work done is given by : \(W = \vec{F}.\vec{S} = FS \cos {\theta}\). Thus, the work done depends upon the angle between the force and displacement.