Physics is everything. Sky diving includes all fundementals of physics. As you go soaring through the air, there are many things that pull you down back to earth. For example, a person's mass is something that brings you down. The greater you're mass, the faster you will get pulled down. Along with mass, gravity plays a roll in sky diving. The force is pulling you towards the center of the earth. The higher up in the air that you are, the less gravitational pull there is.