Consider a UPS delivery van. Part AIs this vehicle streamlined? (yes/no) Part B Which drag force will be dominant, friction drag or pressure drag, and why? (<25 words) Part CBy

what percentage does the speed increase from 55 to 75 mph? [%] Part D By what percentage does the drag force increase from 55 to 75 mph? Assume air as given by the ICAO standard atmosphere at an elevation of 5,000 ft. Assume the aerodynamics of the truck can be predicted by a disk with diameter 9.0 ft.

Fig: 1

Fig: 2

Fig: 3

Fig: 4

Fig: 5

Fig: 6