There is more surface area contact between the road and the flat tire translating into more friction between the two surfaces, which increases the amount of force required to change direction.
The treads on a tire are created by a mold. The tire is placed in the mold and heat and steam compress the tire and the mold forms the tread.
The basic function of an air valve is to control the release of air that is under pressure. Common places where an air valve would be used is on an inflatable tire. It is used to add more tire pressure to the tire.
For a passenger car it takes about 25 minutes to manufacture 1 tire. This includes both vulcanization and curing processes. For larger off-road or truck tires it could take up to 24 hours or longer to produce a single tire. Its the curing process that takes the most time. The vulcanizing process only takes 10 minutes for a passenger car tire but increases by some minute the larger the size of the tire.
If you meant tyre (british) or tire than the answer is Rober William Thomson and he invented it in 1846. John Boyd Dunlop is often erroneously given credit for the invention but he did not develop his tire until 1889. Please note that both Thomson and Dunlop called it a tire not a tyre, though many others in the 19th century did call it a tyre.
Charles Goodyear did not invent the tire. Goodyear is credited with the development of vulcanized rubber. Indeed, when he developed vulcanized rubber, its intended use was not for tires. At the time, he trying to develop a stable rubber tube for use in inflating life preservers. In 1888, John Dunlop invented the first air-filled or pneumatic tire. It was used for bicycles. Phillip Strauss invented the first successful tire for the automobile in 1911. It was a combination tire with an air-filled inner tube.
A flat tire spins faster for a couple of reasons. This could happen because there is no force holding it back. A soft or flat tire has a smaller circumference which forces the tire to spin faster to keep up the same speed.
broken belt in a tire. if you feel it in the steering wheel it usually a front tire or a rear if you can feel it in the seat
Vibration of the tire is caused by a uniformity parameter called "variation of radial force". Usually a vehicle's steering wheel will vibrate (called torsional nimble) at a certain speed. This vibration is caused by the harmonics of this radial force. Picture the side view of a tire with different size springs within it. The force of these springs cause a distortion of this force and you feel this distortion in the steering wheel.
The longer wrench gives greater leverage. It allows a greater force to be applied to the tire at the jaw end with much less force being used at the far end of the wrench.
A flat tire is one possibility
Did they balance the wheel when they changed the tire? The other thing that may be off is the tracking, especially if you drove for any distance on the flat. Get theses fixed or your tires will wear unevenly.
Many mechanical and electrical items could be the cause. Even a flat, or almost flat, tire can cause a problem. Check the steering fluid as well.
If it was easy and now it is hard, you may have thrown a power steering belt. You may need power steering fluid. You may have an obstruction on your front wheels. You may have a flat front tire.
No, once it has a flat spot it will always have a flat spot. Replace the tire.
jack flat tire hammer
A full tire is heavier than a flat tire. When a they are both flat they weigh the same but added air makes the full tire heavier.
To repair a flat tire you first need to remove the tire from the rim. Once removed inspect the tire for the damager and repair the puncture.