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Rimpull/Rolling resistance

  1. Sep 2, 2009 #1
    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.
     
  2. jcsd
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