A collection of videos that examine the physics concepts at play in NASCAR racing. They cover topics such as friction, tires, aerodynamics, balance, and the fire suits worn by drivers.

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]

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....