At work, I am trying to calculate the horsepower required to start a vehicle uphill. We have a hill with a steep grade (14.42%). We are trying to prove/disprove that a delivery truck can stop facing downhill and back into a loading dock. I've seen several calculations of the running speed (page 20 of https://diversity.umn.edu/multicult...edu.multicultural/files/Phys1301CRsolns-2.pdf is the best I've seen), but I can't seem to find the calculations for starting a vehicle. I know the initial friction is much higher then the rolling friction.