when. is work said to be done

a work is said to be done when it is completely finished without any mistake

In science when the object get displaced from its position.work will done.
Example _ if we push a book it get displaced from its position so in language of science work is done. But we push a wall it does not displaced from its position so in science work is not done.

Wehn our appling force is said tobe work done

because the wall is fixed

WORK IS SAID TO BE DONE WHEN THE POINT OF APPLICATION OF A FORCE MOVES THROUGH SOME DISTANCE.

work is said to be done when the force applied on an object displaces the object in the direction of the force

According to Science , work is said to be done when we apply a push or pull and the object moves in that direction.

When its completed... (silly question!)

When a body moves

Work is said to be done when a force applied on an object displaces that object to a certain distance. Please note you have asked a chemistry question in the subject mathematics