Question

A force of 7 n acts on an object the displacement is say 8m in the direction of the force let us take it that the force acts on the object through the displacement what is the work done in this case

Answer 1

We know that work done = F.s

Or W = Fs cos x
where x is the angle between force and displacement.

Here, displacement is along the force. So cos x = cos 0 = 1.

Thus work done = Fs = 7×8 = 56 J