thin uniform rod of mass My and length I. lies at rest on a frictionless sheet of ice. A small ball, also of mass M, moves along the ice with velocity lo perpendicular to the rod. It strikes very near one end M , L of the rod, undergoing a completely elastic collision; af. terwards the ball continues to move along its original di; rection, more slowly than before. (a) What quantities are conserved in the collision, for the system of ball plus rod? (b) After the collision, find the velocity of the ball, the ve- locity of the center of the rod, and the angular velocity of the rod about its center