Seeing that Qiao Yu had seriously entered the state of chopping vegetables, Master Lu nodded with satisfaction and stepped aside to carry out his work.

Let's talk about Qiao Yu on the other side. Although there is a kitchen knife used by Xia's Gourmet Restaurant to cut crystal vegetables, to put it bluntly, it is just sharper and more durable than other kitchen knives, and compared with high-tech kitchen knives, the convenience and speed of cutting vegetables are far from comparable. For example, the electric kitchen knife uses a small capacitor battery equipped on the handle to provide energy, attaches a scorching temperature to the blade, and a special alloy blade can transfer a large amount of heat to the moment it touches the object, softening the substance, so as to achieve the purpose of cutting - in fact, there are also electric knives in military weapons. The electric kitchen knife for civilian use is just a castrated version that reduces the output power and limits the temperature of use. The original physical kitchen knife still relies on the sharpness of the blade and the user's strength to physically cut, which is more laborious and difficult to use than high-tech kitchen knives.

However, as Master Lu said, although it is more convenient and quick to use high-tech kitchen knives, it is also more difficult to ensure the original taste of the ingredients being processed. Qiao Yu only used this kitchen knife for about 15 minutes, although he tried to rotate the strength of his wrists and arms, but the continuous use of a lot of strength was still a not light burden on the muscles that were forced, and this was now the first basket of crystal dishes that Qiao Yu needed to deal with, and there were still many baskets to deal with, the workload given by Master Lu was at least 5 baskets, Qiao Yu estimated that if he continued like this, it would be difficult to cut smoothly in the third basket, and in the fourth basket, I'm afraid that my muscles are already sore and I can't exert myself, and I won't be able to complete today's cooking work by then.

"We have to figure it out." Qiao Yu thought silently. If you want to make your muscles work longer, you undoubtedly need to allocate your strength more precisely, and now the power of cutting into the crystal cabbage, if there are 10 points, then it only takes about 6-7 points to complete the task of cutting the crystal cabbage. Qiao Yu began to try to control his power every time he cut vegetables.

This is obviously not an easy task. Chopping vegetables, the arm is wielding a kitchen knife to cut from top to bottom, in addition to the force used by oneself, but also relying on the help of gravitational acceleration. Without taking into account the force used, gravitational acceleration is completely Qiao Yu's helper, helping him to have a greater impact in every cutting action of wielding a kitchen knife, but if you want to control your output power, then gravitational acceleration is no longer a perfect teammate, on the contrary, Qiao Yu even needs to control his own strength to fight against gravitational acceleration - more force is used, not to mention whether he can still cut the crystal cabbage, even if he can cut it, the force used is more than before, and the gain outweighs the loss. If you use less, you can't achieve the most precise control, and there is still a waste of power.

How can you control the force you exert more precisely? Qiao Yu fell into thought.

"Gravity, gravity, acceleration." Qiao Yu was chopping vegetables and muttering silently in his mouth.

A chef next to him was curious about what Qiao Yu was talking about, so he quietly walked over and listened to it, and immediately sighed with a black line on his face Qiao Yu is worthy of being a student of the God of War Academy, and at first glance he is a scholar-level figure, even in the manual labor of cutting vegetables, he still can't forget the gravitational acceleration. "It's terrible to be a top student now." The chef thought.

Qiao Yu didn't notice the reaction of the person next to him, and he was still continuing to think.

Suppose an object is stationary in its initial state, how do you make it move? A simple knowledge of physics can answer this question – exerting a force on this object. Force is the direct cause of changing the velocity of an object's motion. So, how does the velocity of an object change? The direct cause is, of course, that the object gains an acceleration, and the acceleration mentioned here may be positive or negative, in short, as long as an acceleration is generated on the object, then the velocity of the object will change.

So, how does acceleration come about, and there is no doubt that it is still force. It is the force acting on the object that produces the acceleration.

The so-called gravitational acceleration is an approximately constant acceleration generated by the gravitational force of the planet itself on the objects near the planet to change the motion state of the object.

Qiao Yu thought about it here, in fact, the answer was already very obvious. If you calculate, how much newton power you have to control, this is too difficult for a person, the human body is not a machine, how can you accurately control the power of a few newtons, people use power, more by feeling.

So, where is the way to precisely control power? At speed!

As long as you know the weight of the kitchen knife in your current hand, the speed that will occur when the kitchen knife itself moves freely after gravitational acceleration and the air resistance is negligible, and then compares the speed at which the kitchen knife falls when you swing the knife, you can easily get the force used when you swing the knife - the acceleration is inferred through the speed change of the kitchen knife, so as to obtain the quantified force.

Qiao Yu is not a martial arts master or a master, he can't control his strength just by feeling, but speed, in the eyes of a person with a high degree of brain development, is quite easy to quantify. That's why he has a great talent for shooting – he is very sensitive to speed and dynamic movement. For example, if a car is driven, you can easily guess its approximate speed, but can you tell how much thrust the engine is that makes the car have its current speed? Obviously, the former is relatively easy, while the latter is not something that can be explained by talent and feeling alone.

"Speed, and power. Not in isolation. Qiao Yu was thoughtful.

In this simple work of chopping vegetables, Qiao Yu felt more deeply the truth that Dana said that speed and strength are not isolated.

What the hummingbird said, the world's martial arts, only fast and not broken, is it wrong? No.

Tyrannosaurus thinks that one force will drop ten, right? Obviously it can't be so arbitrary.

Now, Qiao Yu has somewhat understood that strength and speed are not isolated and one-sided existences, but have a dependent relationship.

The faster the speed, in fact, does not mean that the strength is less, the reason why the hummingbird is less powerful than the tyrannosaurus is not because he is too fast, on the contrary, it is precisely because he is so fast that his moves can still have a lot of lethality when his own strength is not very large.

Velocity plus mass, the energy formed is called kinetic energy! To put it more bluntly, in martial arts, it is the impact or striking force of the enemy. In the same way, the Tyrannosaurus rex has great strength, but it is not too slow, if the speed of the Tyrannosaurus is really so slow, how can it seize the opportunity and give the enemy a fatal blow. The so-called speed and strength are all relative. Qiao Yu suddenly had such an understanding.

Looking at the kitchen knife in his hand and the crystal dish on the board, he suddenly became less disgusting and impatient. Although the job is still the same job, in addition to working to make money, this job has other meanings, that is, you can exercise your ability to control speed and grasp power through this rare job of dealing with hardened crystal cabbage.

"Drink!" Qiao Yu yelled, as if to show some determination, and then the people around looked at Qiao Yu with strange eyes and devoted himself to the work of chopping vegetables with great seriousness and a hundred times the strength.

"Well, this kid can't be crazy, right?"

"If you want me to say that Master Lu is not authentic, this kid just came, let him cut the hardened crystal cabbage, even if it is a student of the God of War, it is a bit excessive. This is his first day on the job. ”

"Shhhh

Qiao Yu didn't care about the surprised eyes of the people around him, if this job was just a simple experience and livelihood needs, then now, for Qiao Yu, it is exercise, training, and a little hone on the way to become stronger. "Come on, Qiao Yu, come on! You will become stronger" Qiao Yu cheered himself up in his heart.