Is it possible to "pump" a swing 360 degrees? 1. The problem statement, all variables and given/known data Is it possible to "pump" a swing so that it turns in a complete circle? Assume if you wish that the seat of the swing is connected to its support by rigid rod rather than a rope or chain. 2. Relevant equations Angular momentum Li=Lf 3. The attempt at a solution We know that we can decrease or increase the rotational inertia by standing or crouching on the swing, respectively. However, we are not completely sure if those inertias alone will make it possible to swing in a complete circle.