The corners of a NASCAR track are divided into three parts because the car's grip changes in different parts of the turn. A race crew must try to minimize load transfer by making adjustments based on a car's centre of gravity. [5:05]

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....

Getting the right balance in a race car is difficult because the weight of the fuel changes as the fuel burns off, and the tires wear down during each green-flag run. [5:16]

Conservation of energy explains how this NASCAR race car driver was able to walk away from a horrific crash in 2008. See how the design of the car enabled it to absorb and transform kinetic energy, and protect the driver from injury. [5:30]