Adhesion of a tire to the track surface. We blowed the motor.
Different tracks require different tire compounds.
Depending on the team, duties include everything from making assignments in the shop, to calling the shots in the pits, to handling airline and motel reservations. Downforce increases with velocity - that is, rapidity of motion or speed. The lead car, by displacing air in front of it, creates a vacuum between its rear end and the following car's nose. The second car is actually pulled by the first. When the inner liner loses air pressure and that pressure becomes the same as that within the outer tire, the tire is said to have equalized and a vibration is created.