. For the central force field (conservative), we have seen that when we define u=- the equations of conservation of angular momentum and energy combine to give us a differential r equation: du do ud V t du (1) is the azimuthal (or angular) coordinate, u +U=- is the reduced mass, t where the central potential. If the particle in this potential describes an orbit that is a logarithmic spiral r=ke, what form would the central potential take? is the angular momentum and V