Question

Is it possible that a force acting on a body but still the work done is zero .Explain giving one example.

Answer 1

1. Work is said to be done if we applied a force on an object and the object moves to a distance.
2. So work done $W=F\times s$
3. Where F is the applied force and s is the displacement in the direction of the force.
4. If a force is applied to an object and no displacement is seen in the direction of force no work is said to be done but energy is used.
5. So, when a force is applied to an object and it does not move it means no work is done.
6. Consider a man pushing on a wall.
7. Here, the man is applying force on the wall.
8. But there is no movement in the direction of the applied force.
9. So no work is done but the force is applied.
10. Hence, it is possible that a force acting on a body but still the work done is zero.