Question: 1 . A 2 0 0 0 - 1 b car has Cp = 0 . 4 0 , f = 2 0 ft ?

1. A 2000-1b car has Cp =0.40, f=20 ft?, and an available tractive effort of255 Ib. If the car is traveling at an elevation of 5000 ft (p =0.002045 slugs/ft3) on a paved surface at a speed of 70 mph, what is the maximum grade that this car could ascend and still maintain the 70 mph speed

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