National Science Foundation
National Science Foundation: Science of Speed: Grip
Success in auto racing depends on the grip of a car's tires. Grip is the frictional force that holds the tires on the track. Aerodynamic features of a car also improve a car's grip. [5:02]
National Science Foundation
National Science Foundation: Science of Speed: Tires and Pressure
Tires on a car in a NASCAR race are filled with nitrogen. The force of friction increases tire pressure as the car goes around the track. Using dry nitrogen gas helps with predicting the temperature and pressure of a tire during a race....
National Science Foundation
National Science Foundation: Science of Speed: Friction and Heat
Friction always creates heat. Brakes and tires depend on friction to work, while the opposite is true of an engine. Engine builders use oil and high-tech coatings to get more power from an engine. [5:25]