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As air in insert into the tyre the volume of the tyre increases thus, expanding the size of the tyre by making it firmer all while it forces the walls out the pressure increases because the increased volume doesn't have enough room to move about and so it causes a pressure to be exerted on the tyre walls

Because there is lots of air molecules put in by a pump, Which forces them to go into the tyre.

All of the air molecules get squashed together which makes it tighter and tighter which causes the tire to inflate (Put more and more air in to it) The tyre keeps inflating until you stop pumping air in.

But when all the air molecules get to squashed the tire pops!! Thnakyou.

I hope this was helpful

They cannot escape, unless the tire is porous or leaking. Other variables should also be kept constant: temperature (F1-race tire spinning) and volume (think of overload or bumpy road surface)

As the air particles are in random motion they bombard on the inner wall of the tyre. So momentum changes. Rate of change of momentum would lead to force and force per unit area is defined as pressure. Hence it causes pressure

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