Ok, I understand what this phrase means I have no problem with that, But what I am trying to figure out is the following. The equations I am looking for would be somehting like this: 1. BUllet being fired out of a gun and the force that the gun would recoil back if there was little or no friction. 2. after the gun was fired, and if the gun was at a set angle and a set hieght how far would it fly before gravity made it hit the ground. Also, what is the averate speed of shotgun bullets after they are fired? I cant seem to find this information.