I'm working on a table for a SciFi RPG to construct ship thrusters. The thrusters have a certain output in watts and I need a formula to figure out how many Gs acceleration for a certain mass of ship can be gained by a certain wattage of energy. I'm working from; W = m * d^2 / t^3 Since one gravity is 9.8 m in (1 s)^2, I figure I can just throw in d = 9.8 m and t = 1 s to get the Watts for 1 G. Once I have that, then 2 G is twice the result, 3 G, three times, etc. But, I am suspect of what results. I get; W = m * 9.8^2 / 1^3 Or just; W = m * 96.04. That just doesn't look right. Any thoughts?