I am a very inquisitive person and the other day I started to think about perpetual motion. Since then I have been trying to name the forces that act upon an object and place them into a formula. The whole idea of the formula is really just so I can see what laws of physics need to be broken to allow perpetual motion to work. All I have been able to come up with so far is some forces that act upon an object and I know I will have missed a lot. These are:- Gravity Air Resistance Momentum Friction What I am asking is for help listing the forces that act upon an object and a formula which includes all of the named forces. Thanks in advance.