This is not homework. I'm an old game programmer There is a platform moving at a constant velocity 100. The distance to the 'end' is 75. I have 50 clock ticks to begin slowing down at a constant rate so the platform reaches the end spot and is at zero velocity at the end of the time. I need to know how much to reduce the velocity each clock tick. I know the equation: a = 2(d-vt) / t^2 However this doesn't seem to work for this case. Am I using the wrong formula?