1. Estimate the normal force on a circular sign 8 ft in diameter during a hurricane wind (120 mph). 2. A 1998 Lexus LS400 has a drag coefficient of 0.28 and a reference area of 2.4 m 2 . Determine the...

1. Estimate the normal force on a circular sign 8 ft in diameter during a hurricane wind (120 mph).

2. A 1998 Lexus LS400 has a drag coefficient of 0.28 and a reference area of 2.4 m². Determine the horsepower required to overcome drag when driving at 70 mph at sea level.

a. on a hot summer day T
 100F.

b. on a cold winter day T
 0F