Question

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

Answer 1

Answer:

The moment when a force retards the motion of the body, the nature of work done is Negative, as the motion of the body is in opposite direction of the force exerted on it

Answer 2

Answer:-

The work done by the force during retardation is negative. Work done(W) = F.s Cosθ where θ is the displacement angle. In this case the angle is 180 degree's (since during retardation the angle is 180 degree's).

And Cos180 is -1 ( i.e it is negative). Thus thus the work done by the force during retardation is negative.

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