Question

On I-70 just west of Eisenhower tunnel (in Denver, Colo), there is a 7% downgrade. What is the terminal (maximum) velocity of a large truck coasting down the hill? Assume that the aerodynamic drag is the only retarding force. Weight of the truck is 60,000 lbs, Af = 100 ft2 and Cd is 0.7 (Hint: at terminal velocity the aerodynamic drag equals the hill climbing (in this case rolling down) force.

Answer 1