Football in flight, why does it turn a corner?

There are many friends who love football in the world, especially Chinese football fans, but it is a pity that China's national football team.

It's a bit not very well developed, and friends who have watched the world-class football game must have a big doubt, the flying football can be crooked, which seems not quite in line with science, but in fact, it is because football players use it when they playInstepRub the surface of the ball.

First of all, playing football is kicked with the instep, don't use the toe to kick, otherwise the damage to the toe is very large, and the instep to kick generally can ensure that the moment the football is kicked out has a great speed and keeps a straight line of flight, and in the football game straight flight of the football is the least lethal, the goalkeeper can be relatively easy to hold,Therefore, football players later began to invent how to make the football kick out, and then look at the surface to fly in a straight line, but in fact, to achieve the effect of crookedness, that is, the Messi "S-shaped shooting" move we saw later, and so on.

There is a particularly crucial point here, and that is when playing footballThe soccer player will rub the instep of the ball against the surface of the ballAt this time, it gives the football a lot of friction.

This friction can be imagined as an external force, which makes the football rotate when it flies in the air, and then with the position of the kick to one side, it can make the football begin to shift outside, and finally it will not fly in a straight line, and there will be signs of crookedness.

Of course, this kind of crookedness is also very difficult, because flying in the air is very good will be subject to a lot of air resistance.

The football will form a "small cyclone" when it rotates, which we can simply understand as a small "tornado", and then the superposition of air power will make the air flow speed directly and crazy faster, which will lead to a decrease in the speed of the football when flying, and the degree of crookedness will be greatly reduced, so the football player must cooperate with a lot of strength and skill to make the football have better strength.

Because the kicked football is in a state of high-speed rotation in the air, the air flow speed and pressure on both sides are different, the faster the movement, the less pressure, and the ball will turn under the action of this force.

This is because the ball rotates after being hit, and it turns because of the wind and gravity.

I think it's most likely because the ball spins and causes a lot of friction with the air, giving him the ability to turn. This is also known as the ** of banana balls.