1. Estimate the drag force on a 3-ft-long radio antenna with an average diameter of 0.2 in. at a speed of 60 mph. 2. A 2007 Toyota Prius has a drag coefficient of 0.26 at road speeds, using a...

1. Estimate the drag force on a 3-ft-long radio antenna with an average diameter of 0.2 in. at a speed of 60 mph.

2. A 2007 Toyota Prius has a drag coefficient of 0.26 at road speeds, using a reference area of 2.33 m². Determine the horsepower required to overcome drag at a velocity of 30 m/s. Compare this figure with the case of head and tail winds of 6 m/s.