ID:148649
 Nov 26 2002, 9:49 am
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Ok this is very simple, but I haven't taken a physics class yet so I always screw this up somehow. Basically I need an equation to calculate acceleration (in MPH) based on Horse Power, Torque, Weight, and the Gear Ratio. If anyone can help me out it'd be appreciated =P
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I haven't taken a physics class either, and I made a racing game with decent physics. Mine isn't as in depth (yet), it only factors in tire wear, weight, horsepower, current speed, and max speed for acceleration. I find its easier to write the equations out on paper first. All I did was think of what vars I should factor in, and how they should count. Basically, if a var should be good for it, then I multiply by it, and if a var should count against it, I divide by it. The problem with more "real" equations is that they usually use units like meters per second^2, not pixels per cycle^2. Here is my acceleration equation, I hope it helps:
<code> src.speed += ( src.horsepower / 350 ) * ( ( src.max_speed - src.speed ) / ( src.weight / 10 ) ) </code>