Question: A 3 , 5 0 0 - lb vehicle has a drag coefficient of 0 . 3 5 and a frontal area of 2 0

A 3,500-lb vehicle has a drag coefficient of 0.35 and a frontal area of 20 ft2. What is the approximate minimum tractive effort required for this vehicle to maintain a 70 mi/hr speed on a 5% upgrade through an air density of 0.002045-slugs/ft3?

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