Which principle of gases do air-filled tyres use to make wheels of cars and bicycles run smoothly at the high speeds of today?give reasons in 4 lines
Answers
Explanation:
Because air is a cheap, light engineering material.
The wheels perform several functions:
Lift the car off the ground
Provide a low rolling resistance
Transfer energy from the engine to the vehicle body
Provide friction to the surface so energy transfer (accel or deccel) is efficient and the handling is sufficient
Provide some compliance on rough road surfaces
Now you can engineer a tire with many or all of those features that doesn't require air, but it will likely be more expensive, and heavier.
The heavier part is actually a pretty big deal - inflated wheels, for the load they carry, are very, very light weight. When you are accelerating, you would lose a lot of energy in speeding up the wheel if it had a higher mass, and when braking you'd have a harder time again with that stored energy. At high speeds these four flywheels can significantly alter the dynamics of the vehicle the heavier they are.
But if you have a laminated sequence of materials forming a thin shell, and air, you can have all the above benefits in a very low weight and low cost wheel.
The RC car in the OP is lightweight enough that the rubber shell itself provides sufficient support without adding pressure inside. The supportive abilities of rubber (and the various materials they use now) don't scale to the level of 1,000 pound vehicles in a thin shell.
Answer:
Nitrogen ensures a better grip on the roads
Nitrogen ensures a better grip on the roadsWhen the tyres of your car are properly inflated, they are able to have abetter grip on the road. During wet road conditions, having correct air pressure becomes all the more necessary.