The Strongest Demon Front

It's spring in Manchester.

Old trees sprout new branches, tender grass breaks new buds, birds chirp on the branches, and young men and women gather in groups.

There is a breath of spring in the air.

In the Carrington training base.

Chu Ge, who may be the most expensive single dog in history, carefully placed the football twenty-seven distances from the goal.

He stands in front of the ball, looking towards the goal.

The day's training is over, and the teammates have basically left the training ground to go to the spring date. On the current training ground, Chu Ge is the only one left.

The entire Carrington has been contracted by Chu Ge.

"There are two types of football rotation: one is horizontal rotation and the other is vertical rotation. Behind these rotations, there are certain rules to follow. For example, Bernoulli's principle in physics."

"Bernoulli's principle explains where the force of the football's rotation comes from, but it cannot quantitatively explain the specific trajectory of the football. Because this principle is for an incompressible fluid, air is actually a compressible fluid."

"Specifically explain the quantitative analysis of the football trajectory, you need to use the Magnus effect."

"It is mentioned in Bernoulli's principle that due to the interaction between the ball speed and air pressure, the football will be affected by a force F in addition to its own gravity when it is running. The magnitude and direction of this force F are determined by three factors The three factors are: coefficient (related to the surface viscous resistance), the vector angular velocity of the football’s rotation during flight, and the vector velocity of the football. The vector angular velocity is cross-multiplied by the appropriate speed and then multiplied by the coefficient to calculate the deflection force of the football. size. The right-hand rule can determine the direction of F.”

"The Magnus effect is not limited to football. It exists in almost all ball games, such as basketball, table tennis, tennis, volleyball and other sports. Its main feature is rotation."

"Because of its particularity, there is another situation in football, that is, there is almost no strong rotation, but it can still kick a weird arc. For example, the S-shaped free kick that swings from side to side, and what Ronaldo and I are good at , the rapidly falling Tomahawk-style elevator ball."

"The flight trajectory of this type of football is affected by the air resistance F generated during its high-speed movement, and its magnitude is equal to 1/2ρV??CdA."

"ρ is the air density, V is the football velocity, Cd is a coefficient, and A is the cross-sectional area."

"In football, it is obvious that the greater the speed of the football, the greater the V?? will significantly affect the size of the resistance. In addition to being affected by gravity, the football will also be affected by resistance during flight. The speed of the ball The faster, the greater the resistance, which causes the football to decelerate. After the football flies for a certain distance, with the influence of resistance, the horizontal speed of the football will slow down rapidly. At this time, the biggest factor affecting the flight trajectory of the football is the gravity of the football .Under the influence of gravity, the ball will drop significantly."

"Quick upwards, sudden downwards, this is the elevator ball."

"This phenomenon is very obvious when setting off fireworks. The principle of the elevator ball is based on this."

"The key to kicking the elevator ball is that the resistance must be large enough. The core element that affects the resistance of the football is the initial speed of the football. That is to say, if you want to kick the elevator ball, you must use a large enough ball. Strength, giving football extremely fast speed. Just like me and Ronaldo, when we kick a free kick at 120 kilometers per hour, an elevator ball will appear."

"Theoretically, the trajectories of free kicks can be divided into these three types. But in fact, most free kicks are a combination of the above three trajectories."

"The rotation of the football during flight is not simply horizontal or vertical, but in an inclined state. Whether it is Bernoulli's principle, Magnus effect, or air resistance, it will exist at the same time."

"It's just that the banana ball and the fallen leaf ball focus more on the rotation of the football, while the elevator ball emphasizes the speed of the football."

"In addition, in the high-speed movement of football, there will also be turbulent flow. The turbulent flow cannot be quantitatively analyzed at present.

It is also the existence of turbulence that makes the flight trajectory of football erratic. First left and then right, or first right and then left, because of this. "

Chu Ge did not have the proficiency of taking free kicks as usual.

Facing the goal, he kept thinking, reviewing what homework he had done before.

Since the correct decision can be established in Go through calculations, in football, can the trajectory of the football be determined through the laws of physics?

This subject is very interesting.

In actual football matches, confrontation is everywhere, and there are many factors to be considered in the calculation, which is very complicated.

Therefore, Chu Ge focused his research on free kicks.

Some players mainly rely on talent to kick free kicks; some people mainly rely on proficiency, and only their "feet" are familiar. The combination of the two has produced many free kick masters.

Chu Ge also took this path before.

And now, inspired, he has come to trust science.

For other players, using science to guide free kicks is feasible in theory, but it lacks operability in practice.

But Chu Ge is different.

He is systematic.

After Chu Ge thought of using a scientific method to calculate the trajectory of the free kick and did a lot of homework, the system subdivided the experience of the way of free kick into the way of football.

At present, Chu Ge's experience has reached 60%.

This shows that his current method is effective.

With the assistance of the system, Chu Ge can constantly revise the calculation formula and use experience to summarize the influence of various values, so as to obtain the best free kick shooting method.

Previously, after Chu Ge's elusive attribute reached SS, the system could estimate his elusive success rate.

This gave Chu Ge an inspiration.

All the assistance in the system is based on Chu Ge's own abilities. And if Chu Ge figured out the principle of the free kick's flight trajectory and used practice to correct the routine, would the system also remind the success rate of various free kick penalty methods and routes, thereby improving Chu Ge's free kick scoring efficiency?

"Through computation, AI can become a good chess player."

"Then, through calculation, the taking of free kicks can also reduce the uncertainty. Maybe I can find out the free kick routine that will kill me."

Think about it and start doing it.

Chu Ge set the ball up.

Start targeted practice.

His previous free kick practice was just a simple exercise of proficiency, just like an oil seller.

Now, science has become Chu Ge's weapon.

...

Chu Ge hasn't mainly practiced free kicks for a while, but after he has a goal, he will spend a lot of time on special free kicks after training every day.

"It's not scary to be talented, what's scary is that people with better talent than you work harder than you."

Seeing Chu Ge practicing free kicks every day, even Ibrahimovic couldn't help sighing.

1 second to remember Aishang:. m.