<P> Forces derivable from a potential are also called conservative forces . The work done by a conservative force is </P> <Dl> <Dd> W = − Δ U (\ displaystyle \, W = - \ Delta U) </Dd> </Dl> <Dd> W = − Δ U (\ displaystyle \, W = - \ Delta U) </Dd> <P> where Δ U (\ displaystyle \ Delta U) is the change in the potential energy associated with the force . The negative sign provides the convention that work done against a force field increases potential energy, while work done by the force field decreases potential energy . Common notations for potential energy are U, V, also E . </P>

What does potential energy and kinetic energy have in common