Question

9. When is the work done by a force on a body said to be zero? Give two examples.​

Answer 1

Answer:

Work done is said to be zero when force applying to the body is zero or the Displacement done by body pic zero. if the value that means force acting on body is perpendicular then the force acting will be equals to zero. For e.g. =>The food seller carrying his loads on his head, standing at a place.

I hope u understand

Answer 2

Answer:

The work done by a force is zero when the displacement is 0.

e.g. - When you stand holding a bag in your hands and do not move it. Your hands apply a force on the bag to balance the force of gravity exerted on it but since there is no displacement of the bag, the work done on it by you (your force) and also the gravity is zero.

Please mark it brainliest!!!