Question

In each of the following a force, F is acting on an object of mass, m. The direction of displacement is from west to east shown by the longer arrow. Observe the diagrams carefully and state whether the work done by the force is negative, positive or zero.

3 points



up​

Answer 1

Answer:

Work done can be positive,negative or zero.

Work done is positive when applied force and displacement is in same direction.Hence figure (b) shows positive work done.

Work done is negative when applied force and displacement is in opposite direction.Hence figure (c) shows negative work done.

Work done is zero when applied force and displacement is perpendicular.Hence figure (a) shows positive work done.