Mizukawa walked slowly and said to the three of them: What do you think can be used to connect objects?

When Liuzifeng came to see that the other two people did not speak, he began to preach: Bump and tooth combination. Aren't wooden furniture such as benches and tables made of sports concave and convex teeth? Also, the same goes for keys and key bodies.

Duenias waited impatiently, and immediately said: of course, the connection of objects is inseparable from ropes, and ropes can be tied to objects based entirely on the principle of topology. The connection between objects is established by knotting, so as to achieve a stable state of two objects. I feel that rope can be used more widely and play a greater role.

Margarita waited for a long time, but Duenas did not speak again. She said in a hurry: Another way is to punch holes and screw them. This method is often used in large machines and is not suitable for living things.

Mizukawa smiled: Not bad. So, let's explain the physics of the way you say it! The six sons are coming, are you ready?

Liuzifeng patted his chest, and then raised his head a little. Finally, it was slowly fixed, and then he said: the principle of concave-convex toothing is that the surface particles are not in a plane, and the direction of movement of the force they carry is also staggered. Because of this, the surface particles are balanced with each other, and finally a strong balanced particle system is formed.

Dueñas spoke very consciously: what should be said about the knot of the rope? It's a cross bondage. No matter how the rope moves, the knots cannot be untied automatically. Actually, this is a typical shape force at work. It's like a chair that doesn't even weigh fifty pounds, and it's still overestimated. In fact, it doesn't even have ten pounds. You could say that the bench is made of wood and has a high degree of hardness. That's right, the high stiffness does carry a lot of weight. However, the hardness of plastic stools is probably not very high. And the plastic stool does not exceed ten catties, so why can it bear the weight of a person of more than a hundred catties? You might say that the human feet are not in the air, and the ground bears some of the weight. Even so, the performance of the plastic stool is still surprising. As you may have noticed, plastic stools have connecting rods. However, metal stools do not. The question is, what is the role of the connecting rod? I think it's reinforcement. In fact, neither plastic nor metal can directly bear many times the weight of itself. The reality is that they did, and why is that? Shape. Shape is at work, and its form of action is the shape force.

The shape force is a very hidden force that many people overlook. Even physicists don't realize its importance, and perhaps there is no such thing as a shape force in their brains.

Margarita was somewhat surprised, though the force of shape was discussed. But it was the first time she had heard of a stool like today. She thought for a moment and said: Punching holes can be seen many times in the machine. The essence of perforation is to allow the part to enter the object and thus be constrained. I think you can think of the hole as a small space, and the screws take up almost all of it. Since this space has a strong stability, the screw cannot get out of it. So, they can form a stable system.

In my opinion, perforation can be seen as another mode of concave and convex toothing. Of course, the principle is the same as it is.

Seeing that everyone had finished speaking, Mizukawa said it himself: I suddenly remembered something. It is said that if the key is broken in the keyhole, you can pour match powder into the keyhole and use a lighter to light the match powder. In this way, the key body can be opened.

Physics is no small matter, and it is full of details. If there is perseverance, there will be discovery.

I don't want to say any more, I just hope you can rest well. Tomorrow, I wish you all the best of luck. Remember, meet here at the same time tomorrow.