# Work done by a Constant Force

Let a constant force  be applied on the body such that it makes an angle Î¸ with the horizontal and body is displaced through a distance  (Fig. 1).

Fig. 1

or  = Fs cos Î¸

Thus, work done by a force is equal to the scalar or dot product of the force and displacement of the body.

If a number of forces  are acting on a body and shift from position vector  to position vector , then