Lov Gravity Movement (for games)

This code is shows how to easily make movement in games that take place in outer space or mid air where movement is affected by momentum and drag... ONLY 3.5 KB - I made this code for a game i am developing - IF ANYONE CAN IMPROVE UPON THIS CODE TO MAKE IT ANY FASTER PLEASE DO SO AND LET ME KNOW BY E-MAIL OR POST IT ON HERE... thanks alot.. happy programming