Explain why the air pressure in a car tire increases while the car is in motion.

(N/A) When a car is in motion,the friction between the tires and the road surface generates heat.
This heat is transferred to the air inside the tire,causing the temperature $(T)$ of the air to increase.
According to the Kinetic Theory of Gases,for a fixed volume $(V)$ of gas (the tire volume remains approximately constant),the pressure $(P)$ is directly proportional to the absolute temperature $(T)$ as per Gay-Lussac's Law $(P \propto T)$.
As the temperature of the air inside the tire rises due to friction,the kinetic energy of the gas molecules increases,leading to more frequent and forceful collisions with the inner walls of the tire.
Consequently,the air pressure inside the tire increases.