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## Homework Statement

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?

## Homework 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!