1. The problem statement, all variables and given/known data Lab on circular motion. The class swung a mass in a circular motion by a string. --Find percent error of the trail. Total mass=0.25kg radius=.448 meters period=.427 seconds 2. Relevant equations I am not sure 3. The attempt at a solution This is one of those problems that drew me a blank... I have no idea where to start. It would be great if someone could just start me off with what i am trying to take the % error of. I know that % error is actual/theoretical X 100%. I just don't know what I am trying to solve. Thanks.