dquarasr
Registered
Mythbuster's analysis is flawed. If the gun barrel is moving laterally when fired, the bullet is traveling laterally, too while it is in the barrel. Once it leaves the barrel, the side motion is no longer being applied, but it is then on a trajectory with the lateral vector added to the barrel's outbound vector. It would travel in a direct straight line because there is no longer side influence, but not directly in line with where the barrel was pointing when the the bullet left the barrel. Kind of like throwing a baseball straight out the window of a moving car. It would travel in a straight line (assuming no spin on the ball), but would land "down the road" from where it left the window.