Determination of Work Done by a Force and Displacement Graph #8211; If we plot a graph between a force and displacement, then area of the graph will give the work done by that (i) Work done by a variable force W = area (Ad<sub>1</sub>d<sub>2</sub>B) (ii) Work done by a constant force W = area (Ad<sub>1</sub>d<sub>2</sub>B).