1. The problem statement, all variables and given/known data I have a path defined in polar coordiantes defined as r=a*cos2(θ). I also have the velocity along this path as a function of θ. I want to find the time take to move between two given angles on the path. 2. The attempt at a solution I know that this problem will involve some kind of integration but what is the general method behind solving this kind of problem.