Question

What is workdone and its unit

Answer 1

If an object displaces an object, from a point to another, when any force is applied on it, it is said that, work is done on that object.
Work done =Force*Displacement.
It's S.I. unit is J, i.e., joules.
or, N m.

Thank you.
Hope this will help you.

Answer 2

The amount of force we apply on the body to change its position is called work done. Its unit is Joule.