1. The problem statement, all variables and given/known data When a tether ball wraps around a pole, the speed of the ball does not change. I need to explain why using conservation of energy but am struggling in this class and need to see if I'm on the right track. The second part of the problem states that if the length of the tether is decreased the velocity of the ball doesn't change but the rotational speed of the ball changes how? 2. Relevant equations 3. The attempt at a solution I think because the ball has kinetic energy while wrapping, when there is no more rope to wrap around the pole, the ball has potential energy to unwrap. Once this happens the ball has kinetic energy again. The second part I think, would have the rotational speed of the ball decrease but I'm not sure why. Any help would be appreciated.