1. The problem statement, all variables and given/known data A particle in central force feild has the orbit r=cφ^2, c is a constant. Find the potential energy, Find r and phi in terms of t. I get how to find the potential energy and found it to be U=-l^2/mu (2c/r^3+l/2r^2) l is angular momentum and mu is the reduced mass But how do I get r and phi in terms of t after this? 2. Relevant equations From what my professor showed in class l=mu r^2 dφ/dt was important he used that to integrate and get r^2(t)=lt/mu I'm trying to use this method to get r and phi Any help is much appreciated, thanks!