Another Fine Gymnist problem .... A gymnist is swinging on a high bar. The distance between his waist and the bar is 1.0 m, as the drawing shows. At the top of the swing his speed is momentarily zero. ignoring friction and treating the gymnist as if all his mass is located at his waist, find his speed at the bottom of the swing. I know it must have something to do with The conservation of mechanical energy however im not sure how to set up both sides of the equation ? my algebra is a little ruff.... I an lost here i know some stuff must cancell out but what ? it all cant cancell out Mass must cancell because it is not given to you but what else?