A Freight truck is driving down I-95 at 70 mph.
a. Assuming the truck is driving through calm air, what is thepressure that is exerted on its frontal area when cruising at thatspeed? Make necessary simplifying assumptions.
b. How many pounds of force are experienced by the front of thetruck assuming its frontal area is flat and 13 ft by 8 ft?
c. In full-scale wind tunnels, engineers recreate wind flow indriving conditions to understand how their designs would fare inthe real world. What wind speeds are typically reached in windtunnels? Cite your sources.
d. What power from the truck’s motor is needed to overcome thisforce?
Extra credit: What is the ultimate thermodynamic effect ofpropelling the truck for one mile over level terrain?
