Question

when do we say work is done

Answer 1

when a force is applied and the object is displaced

Answer 2

Hey there!

We know,

Work = force * displacement

Here,

work ∝ force and work ∝ displacement

So, we can say that work is done when :

a) A force of certain magnitude acts on body

b) the body is displaced from it's initial point due to action of force.

Hope It Helps You!