Question

expression for work done​

Answer 1

Workdone=Force X Displacement

W=F*s       ;s is displacement

It can be also written as W=F.dscos(theeta) where theeta is angle between direction of applied force and displacement of the object in which force is applied.

Answer 2

The work done is the component of the force along the direction of the displacement multiplied by the displacement.

Let F be the force and ds be the elemental displacement by the compent of the force. In vector form work done by a force F is

W = F . ds.