1. The problem statement, all variables and given/known data A small object of mass m, on the end of a light rod, is held horizontally at a distance r from a fixed support. The object is then released. What is the angular velocity, ω, of the mass when the object is at the lowest point of its swing? 2. Relevant equations This is my problem. I believe it is a conservation of energy problem so: PEi + KEi = PEf + KEf however I am not sure what the angular equivalent to mgh is. 3. The attempt at a solution mgr = (1/2)(mr)^2(w)^2 2g = r(w)^2 (2g/r)^1/2=w Which is the correct answer but I am not sure about my math or my formula, did I do this problem the right way or did I just get lucky?