Question

How does the air in the tyre exert a pressure on the walls of the tyre?

Answer 1

The air in the tire exerts pressure on the walls of the tire due to the collisions of the air molecules with the walls. Initially, the pressure doesn't increase much as the volume of the tire expands, but once the tire reaches its full size, the walls limit the expansion of the volume, increasing the pressure.

Step-by-step explanation:

When air is pumped into a deflated tire, the air molecules inside the tire collide with the walls of the tire, creating a force on the walls. This force is what we call pressure. The pressure exerted by the air in the tire is evenly distributed on all parts of the tire wall, which is why the tire doesn't collapse.

As the volume of the tire increases, the air molecules have more space to move around, reducing the frequency of the collisions with the walls. This is why initially, the pressure doesn't increase much. However, once the tire reaches its nearly full size, the walls limit the expansion of the volume, causing the air molecules to have more frequent collisions with the walls and increasing the pressure.

Overall, the pressure of the air in the tire is due to the impacts of the air molecules on the tire walls, and this pressure is evenly distributed on all parts of the tire.

Answer 2

The air inside the tire exceeds the outside pressure. At sea level, air exerts 14.7 pounds per square inch on all surfaces. This includes the outside of tires as well as the inside. Compressed air is pumped into the tire to say 35 pounds per square inch. Inside the tire has 35 psi being exerted on all surfaces. Remember, 35 pounds per square inch. Calculate the area inside the tire and for every square inch, there is 35 pounds of pressure being exerted on every square inch.
Hydraulics work on the same principals.