Question

From a scientific point of view,,,,when do we say that no work was done?
plzz answer fast....

Answer 1

When there's no change in the position of the object with respect to time, we say that no work has been done

Answer 2

Work is done when a force that is applied to an object moves that object .
If the work is not done then the object does not move
When the displacement takes place only then the work take place otherwise there will be no work
when the angle between the displacement and f is 90°