A man is walking on a platform platform. The conservation of center of mass motion leads us to location of the man at a later time.

Two discs collide while the one at the bottom was rotating about a fixed axis passing through its center.

The Kinetic Energy equation for a two particle system is written in terms of the relative velocity and the center of mass velocity.

#collisions #centerofmass #physicspractice #algebra it is possible to stop a cart by throwing several sticky balls towards it.