Multiple choice

Why does the pressure of car tires increase after driving?

  1. Air molecules break up to form separate atoms

  2. The force between air molecules increase

  3. Air molecules expand

  4. The speed of the air molecule increase
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

As the tire heats up from friction while driving, the kinetic energy of the air molecules increases. According to the kinetic theory of gases, higher molecular speed results in more frequent and forceful collisions with the tire walls, increasing pressure.

Keep practicing — related questions