What is the principle behind the operation of tire pressure gauges?

Answer 1

Well I thought there would be more to this question...1st off, all pressure gauges are not equal...they can vary by 5 pounds of pressure per square inch. 2nd off they are used to keep all tires at recommended pressure for maximum control of the vehicle as well as keeping your tires in optimum shape. They can also be used to see if one tire is leaking air so you know to get a flat repaired. Operation itself is simple....the pressure from the inside of the tire pushes on the guage at a consistent force...the friction holds the guage in place so to make it simple....Its like pushing on a block up a hill that gets steeper and steeper...you have to push a certain amount to get it to move and if that force is constant, when the hill gets steep enough, that force is no longer sufficient to keep it moving. So ergo, your guaged psi.

So in easier terms...it goes Poooohhh ( Like he said )

Answer 2

for every reaction there is an equel and opposite reaction, Newtons 3rd law of motion, you see the guage needle or pop up thingy moves equel to and opposite the movement of the air when the valve is opened, thus air released from the valve moves against the guage and produces an opposite reaction on the needle or pop up thingy, the movement of the guage is always proportionate (equel) to the amount of air pushing outward inside the tire and released through the valve stem, thus the reading on the guage for volume air in the tire is always the same.

Answer 3

it checks to make sure you have the correct level of air in each tire. to keep from wearing your tires out prematurely.

Answer 4

See this site.

It's great for HowStuffWorks!

Answer 5

Put it on, and Poooohh...