1. The power, needed to overcome the aerodynamic drag on a vehicle traveling at a speed U varies as W ∼ Un . What is an appropriate value for the constant n? Explain.
2. Estimate the power needed to overcome the aerodynamic drag of a person who runs at a rate of 100 yds in 10 s in still air. Repeat the calculations if the race is run into a 20-mph headwind. (See Fig. 14.18 for drag coefficient data.)