A racecar has a kinetic friction force of 8,000 newtons and a rolling friction force of 125 newtons. Its kinetic coefficient constant is 0.8. What is its rolling friction coefficient?

0.0125

0.0140

0.01

0.0156

A car with a mass of 850 kilograms has a rolling friction force of 115 newtons. What is its rolling friction coefficient?

0.00019

0.0069

0.1175

0.0138

The drag force on a race car traveling 25 meters per second is 9,000 newtons. What is the drag force on the same car if it is traveling 100 meters per second?

225,000 N

72,000 N

36,000 N

144,000 N

A spoiler on a Formula 1 car generates 8,250 N of downforce when the car is traveling at 60 m/s. What is the surface area, to the nearest tenth of a m2, needed on the spoiler if it has a lift coefficient of 1.5?(1 point)

3.7

2.5

3.1

1.7