Target Exam

CUET

Subject

Physics

Chapter

Work Power Energy

Question:

When the force retards the motion of body, the work done is : 

Options:

Zero

Negative

Positive

Depends upon the displacement

Correct Answer:

Negative

Explanation:

Work done is given by : \(W = \vec{F}.\vec{S} = FS \cos {\theta}\).

For retarding force, F = negative.

Thus, when the force retards the motion of a body, the work done is negative.