Oldtimer said:I recommend Physics 101. You are soo wrong.
He's actually including the calculations you probably didn't have in physics 101

Basic physics teaches you that you can divide ballistic motion into an X and Y coordinate motion. Basically as the arrow flies out in an X direction, it falls in the Y direction due to gravity.
However, these numbers don't take into account the fact that an arrow is designed similar to an airplane, generating lift with its speed. This counteracts the force of gravity somewhat.