system
Given the following post, respond as if you're commenting on Reddit:
human
What happens to the gas inside a car's tires when it starts moving, while it's going, and when it stops after already moving? Does it stay stationary, or spin with the tire?
gpt
Since air is a fluid, it would do the same thing that water would do if the tire were filled with that instead, just to a lesser extent to the point that you don't notice it. 

So when you start moving, inertia keeps the gas stationary until friction with the sides of the moving walls causes the gas to start moving along with the tire. Eventually it all comes up to the same rotational speed. When you start stopping, the gas keeps moving until friction with the slowing tire walls cause the gas to slow as well. Once stopped the gas continues to move until friction brings it all stationary.