1. The problem statement, all variables and given/known data Is it possible that a vehicle weighing 2000 kg and a vehicle weighing 13000 kg can both use the same skid to stop formula?? Does the difference in weight not come into account? 2. Relevant equations Where : S = speed in km/h µ = .75 d = skid distance S = 15.9 *( sgr ( µ d )) 3. The attempt at a solution I know how to do the above equation. It is the derivation I do not know how to do. in order to prove or disprove the weight effect on the speed.