## Motion Under Central Forces (part 2)

This article covers topics like Law of conservation of energy, Equation of motion and Form of motion under the effect of central forces.

## Law of conservation of energy

From equation 4 we consider

\[f(r) = – \frac{{du(r)}}{{dr}}\]

then this shows that \(f(r)\) is not only a central force but a conservative force. In this condition this equation