Question

State the condition where the work done is positive and negative

Answer 1

Positive work : Work done is positive when a force acts in the direction of motion of the body.

Negative work : Work done is negative when a force acts opposite to the direction of motion of the body.

Answer 2

Answer:

(i) If the displacement of the body is in the direction of force, then work done is positive.

Hence, W= F x S.

For example: A coolie does work on the load when he raises it up against the force of gravity.

(ii) If the displacement of the body is in the direction opposite to the force, then work done is negative.