Pressure, Heat, Friction, and Grip

Hot tires on a racecar have ______ grip.

Which of these parts of a car are susceptible to friction?

• the brakes and brake rotors

• the car's engine

• the tires of the car

• all of these parts are susceptible to friction

Hot tires on a racecar have ______ grip.

Why are racecar tires wider than the tires on a regular car?

The warmer the tire, the ______ the pressure inside of the tire.

What does "psi" mean with regard to tires?

• pounds per cm²

• pascals per inch²

• pounds per inch²

• pascals per cm²

What gas is used to fill the tires of NASCAR race cars?

• oxygen

• nitrogen

• carbon dioxide

• helium

How do NASCAR drivers get more "grip?"

According to the ________ principle, the air over an object creates a difference in the air pressure.