# work

Work is the overcoming of a resisting force over a
distance. The work performed when a force *F* overcomes an equal
resisting force along a distance *s* in the same direction equals *Fs*, i.e., *F* times *s*.

If the force is not in the direction of the motion, only the vector component of *F* in that direction enters the calculation. Thus,
If a force *F* acts on a body and the body moves a distance *s* at an angle *θ* to the line of action of the force then the
work done *W *is defined as being the product of the force, distance,
and the cosine of the angle, i.e.,

W=Fscosθ

The unit of work, or energy transfer, is the joule (J). One joule is the energy transferred when a force of 1 newton is applied over a distance of 1 meter in the direction of the force. This makes the joule the equivalent of kg m

^{2}s^{–2}with dimensions of [M ]^{1}[L]^{ 2}[T]^{ –2}.

Energy can be defined as the ability to perform work.