1. The problem statement, all variables and given/known data 1.A Ferrari has a V-12 engine rated at 540 hp, it has a maximum speed of 196 mph in sixth gear if the engine efficiency is 90%. Determine the maximum rimpull. The Ferrari weighs 4,055 lb and is operated over a concrete road with rolling resistance of 40 lb/ton and a slop of 3%. Determin the maximum enxternal pull the Ferrari has when operated in sixth gear at maximum speed. 2. Relevant equations Rimpull=375*hp*effiency/mph 3. The attempt at a solution I simply plugged and chugged and got 928.8 lb =375*540*.9/196 this is wrong i believe because I think I have to incorporate the slope in it but I am not sure how. It is an extra credit problem so its not in my book.