Cheng Huailiang gave them an example, saying that a person can lift a thousand boulders, do you believe it?

As soon as Cheng Huailiang's words came out, everyone was in an uproar, how could this be? Back then, Xiang Yu's ability to carry the tripod was considered a great warrior by the world, but no matter how heavy your tripod is, it is impossible to have a thousand catties, and what Cheng Huailiang said is that everyone has the ability to carry the tripod, and everyone can lift thousands of catties, they don't believe it.

Cheng Huailiang knew that they didn't believe it, they had already prepared, and they had already instructed the blacksmiths to build a lot of pulleys, there were moving pulleys, there were fixed pulleys, Cheng Huailiang told them the principle very simply, the fixed pulley pulled up things, how much force you have to spend if the thing weighed, what about the moving pulley, you 1000 catties of things A fixed pulley will only cost 500 catties of force, then only 250 catties of force is needed to use two movable pulleys in a certain way, and if you use three, it will only take 125 catties of force, If there are four, it only takes a few dozen catties of strength to pull 1,000 catties of boulders.

Everyone has studied physics and knows the principle of moving pulleys and fixed pulleys, but they don't know, so Cheng Huailiang spent a lot of saliva to tell about it, the elaboration of formulas and the like, and Cheng Huailiang was tired to death.

In the end, Cheng Huailiang waved his hand and took his brothers to the place where they were repairing, where a piece of land was leveled, and first used a movable pulley to let everyone have an intuitive understanding.

Cheng Huailiang asked people to nail two shovels into the ground in the open space, fixed two fixed pulleys at the upper end of the shovels, and then put a rope from the fixed pulley, put a movable pulley in the middle of the two fixed pulleys, and made an iron hook under the movable pulley, so as to facilitate the ditching of things for a while.

Cheng Huailiang asked Yu Chi Er to move a big stone next to him, and Yu Chi Er went to move a stone that was about more than 100 catties and staggered over and put it in a basket. Put the rope of the basket on the iron hook of the moving pulley, and then Cheng Huailiang asked him to pull down the rope on the side of the fixed pulley to see what it felt.

Yu Chi Er stupidly ran to the side of the rope and pulled it vigorously according to his strength just now, only to find that the stone in the frame was bounced up by his fierce pull and thrown high. Wei Chi Er was a little confused, the force he used just now was almost the same, why is there such a big difference, this time he can get the stone to the sky.

Cheng Huailiang asked him to slow down, slowly pulled the stone up, to see if the power used was the same as the force he moved at the time, Yu Chi Er was very obedient and put down the stone and slowly pulled up the rope, but it turned out that it was too much more labor-saving than just now, Cheng Huailiang asked Yu Chi Er to tell everyone what it was like. Yu Chi Er said stupidly, saying that the stone had become lighter, not as heavy as just now.

Cheng Huailiang asked Yu Chi Er to go, but the unbelieving Yu Chi Er was very stubborn, he ran to the basket again and moved the stone, but found that the stone had not become lighter, scratched his head in confusion, and walked away.

Cheng Huailiang asked everyone to feel it. Let's see if it's as Wei Chi Er stupidly said.

As soon as Cheng Huailiang's words were finished, a group of people rushed over like a swarm and experimented one after another. It's amazing for them, it's incredible.

A group of people kept experimenting somewhere, and there were constant screams, they thought it was amazing, Li Ke and Li Tai had gone to experience it, and sure enough, as Cheng Huailiang said. Li Tai's eyes lit up, he felt that he had found something more interesting, and he put the bracket in his hand first, and let the people below figure it out, the principle of this thing must be understood.

Cheng Huailiang saw that everyone felt about it, and then explained the principle again. Said if you want to see it, I can get a thousand boulders for everyone to lift, but in that case, it will be a little more troublesome to build a fixed pulley, the principle is the same, today the main thing is to tell you the principle, you have to believe in the power of knowledge, knowledge can change the world.

For example, why do people jump up and fall to the ground? Why can't a man fly, but a bird can fly? Why does the water flow lower and not higher? Why is there spring, summer, autumn and winter? Why do we eat different things in Guanzhong and people in the south?

Yes? Why is that? Everyone asked one after another.

Cheng Huailiang smiled, he didn't tell them, but they studied it seriously, studied it carefully, the knowledge they studied was their own, what I told you was still mine, there was no meaning, what I wanted was for you to find the answer by yourself and find the truth by yourself.

Cheng Huailiang said that Li Tai has always taken things for granted, but today Cheng Huailiang brought it up and he thought about it carefully and seriously, why is this? But he still has no clue, it seems that he has to go to Cheng Huailiang when he comes down, if he can't understand these questions, he will definitely not have a good rest recently.

Next, Cheng Huailiang quickly gave them the courses from elementary school to junior high school to high school according to the courses he had prepared, and taught them slowly, Cheng Huailiang didn't want to be trapped in school for the past four years, so he taught them first in a cramming way, so that they could learn and master slowly.

The gentlemen have worked very hard and seriously, but the more they study, the more depressed they become, there are too many doorways in this, Cheng Huailiang's lessons often make their heads a mess, Cheng Huailiang makes them very tired when they memorize a multiplication formula table and division formula table, not to mention others.

The progress of the gentlemen is huge, and they have begun to change slowly before they know it, although they still have a lot of habits in them, but there is a huge difference from when they first came.

Now the weather is very hot, Cheng Huailiang doesn't want to suffer anymore, so he gave the students a vacation, telling them that they can rest for a month, and then start school in a month, now is not a good time to study culture, the weather is too hot, not to study culture, when studying, go back and adjust a month later, everyone has to study for four years, it's still early.

The gentlemen heard that there was a holiday, and there was a month of vacation, and they all ran happily to tell each other, and stayed in this place where the birds did not lay eggs for a few months, and the birds were about to fade out of their mouths, and now it was finally time for the birds to fly in the mountains, and the time for the sea to leap with the fish, and a large group of people who played hooked shoulders and carried their bags back to Chang'an City.

The people of Chang'an City found out that the gentlemen had returned, and those who had daughters hurriedly called their daughters back, so as not to be molested by this group of unscrupulous gentlemen for a while, so how could they marry in the future?

But everyone was surprised to find that after the gentlemen came back, the first thing was not where to play, but all of them returned to their homes, and their return was like a drop of water into the sea, without a ripple. (To be continued.) )