Question

How does a tyre get inflated ?..

Answer 1

Cars experience a lot of shock in terms of bumpers, pot holes, obstacles etc. If you used a solid material (Say rubber) you would experience every bump & obstacle in the passenger seat because solids are good conductors of vibrations (Just like conducting electricity), while gases are compressible and can absorb shock, by having a lot of empty space inside it to give and take, enabling a smoother rideThe mass of a solid tire will be significantly higher than that of a air filled tire (No matter how light the material is). This will cause two significant problems. A solid tire would wear out much quickly than the one filled with gas, because the friction (Which is proportional to weight) of the tire with the ground, would be high. Second, more mass means more power consumed to operate, leading to less mileage and higher operating cost.And most important of all, the cost involved and the technology required to manufacture these solid tires would be very high, imagine all that rubber going in, if it is some other innovative material, the cost factor would spike higher. Imagine paying a fifth of the car's value just to replace 2 pairs of tires?

Answer 2

When air is blown in the tyre the empty space inside is occupied by the air and thus it gets inflated.(common sense)