Compare and plot the power (hp) required by a typical large American sedan of the 1970s and a current midsize sedan to overcome aerodynamic drag versus road speed in standard air, for a speed range of...

Compare and plot the power (hp) required by a typical

large American sedan of the 1970s and a current midsize

sedan to overcome aerodynamic drag versus road speed in

standard air, for a speed range of 20 mph to 100 mph. Use

the following as representative values:

If rolling resistance is 1.5 percent of curb weight, determine

for each vehicle the speed at which the aerodynamic force

exceeds frictional resistance.