Question

Can work done on an object become zero? Explain with example.​

Answer 1

Explanation:

Zero work is done when the displacement of a body is zero or perpendicular (θ=900,cosθ=0) to the direction of force applied, then work done is zero. For example, if a person tries to push a wall, he is applying force yet the wall does not move, so the displacement of the wall is zero, and hence work done is zero.

Answer 2

Answer:

The force is always perpendicular to its velocity (dtdx=0). The object moves in such a way that the point of application of the force remains fixed (dx=0).