Hello: If a person rides on a wheel that has the same speed throughout rotation. Does this mean that magnitude of angular velocity is same throughout rotation? I think if the wheel has the same speed, then the centripetal force is equivalent throughout rotation. Now, the person decides to carry a spring to weigh himself. The maximum of the spring reads X, and the minimum reads Y. So, wouldn't I have: w = angular velocity N = normal R = radius of wheel -N - mg = -mw^2*R (at top) N - mg = mw^2*R (at bottom) So, N top = mw^2*R - mg, N bottom = mw^2*R + mg? And N top = Y, and N bottom = X. I am supposed to find m, but somehow there's something wrong with this equation. Thanks.