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The two major forces opposing the motion of a vehicle are the rolling resistance of the tires, Fr, and the aerodynamic drag force of the
The two major forces opposing the motion of a vehicle are the rolling resistance of the tires, Fr, and the aerodynamic drag force of the air flowing around the vehicle, Fa, given respectively by Fr=fW and Fa = CaA(p V2/2) where f and Ca are constants known as rolling resistance and drag coefficient, respectively, W and A are the vehicle weight and projected frontal area, respectively, V is the vehicle velocity, , and p is the air density. For a popular gasoline hybrid car with w= 3029 1bf, A = 6.32 ft- and Ca =0.30, when f= 0.02 and p= 0.10 1b/ft', complete the following: Determine the power required, in hp, to overcome rolling resistance and aerodynamic drag when V is 100 mph. At this speed, which required more power
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