> I've been trying to get a sprite (the ball) to fall from the top of > the screen with realistic gravity. I did attempt it, however it's not > so great so I won't post it here. These might help: http://hyperphysics.phy-astr.gsu.edu/hbase/traj.html http://www.makingthemodernworld.org/learning_modules/maths/04.TU.02/?section=1 Alan