In this video, there are many examples of physics. When Jeter has the bat in ready position, the bat has potential energy. When he swings, it converts to kinetic energy. As the pitcher throws the ball, he too is converting potential energy to kinetic energy, giving the ball velocity and momentum. When Jeter hits the ball, the combined momentum of his swing and the ball sends the ball out and over the fence. This illustrates the Law of Conservation of Momentum.