I saw Xiao Wu take a rope and wrap it around his waist, and at the other end, still on the horizontal bar, grabbed the rope that hung down, and easily pulled himself up!

In fact, when they saw Xiao Wu's movements, most people understood! It's that simple, why can't you think of it?

"Yes, but it's not the easiest way to do it!" Liu Ao, take down one of the iron guys above, and then pass the rope in Xiao Wu's hand in, and hook the iron thing on the horizontal bar. Let Xiao Wu experiment again!

Xiao Wu pulled it suspiciously, and his face suddenly showed a happy color!

"This thing, I call it a pulley, and the well we use has a reel on it! It's less effort than using your own hands! And with this pulley, thousands of catties, tens of thousands of catties of things, will not be immovable, even a woman without a chicken can pull up thousands of catties of things! ”

Lead everyone to the playground, there is a rockery, there should be more than 2,000 catties!

There was a shelf erected next to it, and there were already a lot of pulleys on it! High and low combinations are arranged. These pulleys are Liu Ao's drawings and the hard work of the old blacksmith!

When running and exercising in the morning, everyone saw that the price retainers of Liu's Mansion were busy, and it turned out to be a preparation for the lecture!

The rockery was tied with an iron chain, and then threaded onto the pulley, passing through several pulleys! Then, start pulling the chain yourself. moved, moved, Liu Ao didn't seem to have much trouble pulling up the rockery.

Then put it down! Let her sister, Xiaoju, because she is relatively thin.

It is true that Xiaoju can also pull up the rockery and exclaim! Zimu doesn't know when he came in from the outside! Watch Liu Ao perform the role of the pulley. He looked surprised!

Everyone's enthusiastic experiments have been addicted.

"This. It's the power of Gewu! It's the power of knowledge! It is the power of human intelligence! In fact, this thing is not new! Ever since there were wheels. For example, the wheels of horse-drawn carriages, the wheels of wells, and the rolling wood used by everyone to move large rocks in the past, they are all labor-saving tools!

Then, Liu Ao found two iron rods, one long and one short, and performed the principle of the lever again.

"I don't know what you can learn from this, what inspiration you can have. The application of this is an important theory that can promote the progress of our Datang and even our human beings, and this theory is called the lever theory!

Okay, that's all for today's lesson, and I'll talk to you again when I have time. ”

"There's one more. What is it about water that can catch fire? "It's Li Tai who asked, why is this kid so interested in this? I forgot about it.

It just rained last night, and there is a pond in the backyard that used to be planted with lotus flowers and fish. The pond was almost full of rainwater.

A large group of people watched Liu Ao pour a cowhide bag of liquid on the water!

This experiment was dangerous, and Liu Ao discerned the direction of the wind. It doesn't hurt people and destroy things when you look at it! Except for a few trees on the side, it is far away from other places that are prone to fire.

Folds with fire. Blow and throw directly to the surface of the water. "Boom"! Gasoline, a cowhide bag! Say less than a dozen pounds! The fire fold was burned in an instant!

The blue flames don't look like they're hot, but the heat wave is amazing! The air around it seems to have been drained away, and it is unusually hot!

"What is this, so powerful?" Even Cheng Chumo, who has never been very fond of asking questions, couldn't help but be curious!

"This is gasoline, it can't be produced in large quantities for the time being, in the future, this thing will be the most precious thing in my Datang, there is no one!" Liu Ao said affirmatively.

In a blink of an eye, a morning passed, Liu Ao was thirsty and uncomfortable, so he announced the end of the class, washed his hands and face, and went back to his study......

"Today's lesson will be the most practical lesson I have learned in so many years of studying, and I must report it to my father!" Li Tai trembled with excitement.

He is not the only one who has this idea? At noon, most of the students did not eat in the cafeteria......

"Young master, if it weren't for your understanding and the old slave's own identity, the old slave would have doubted whether you were the one who lost the same vein as my father, to be honest, we also used your things, except for gasoline! It's just that it's not as complicated and labor-saving as few uses. ”

In the study, Zimu regained his wooden-style face.

Cha! Zimu is a male loser? Luban's descendants? Liu Ao was shocked by this news!

Tian Xiangzi is a male loser, and so is this Zimu? It's messy! How can a person of the same clan become the son of God and the Lord of the Lord?

"The old slave told you that the division of the public and the loss of the same line, the old master, according to the seniority, should still be the uncle of the old slave. The split vein is only about the manufacturing you mentioned, the ships, the mechanisms, the buildings!

And my vein belongs to all those who practice martial arts, and pursue the righteous path of martial arts! And the old master's opinion and ability, he said that he can have a chance to enter the immortal gate, and our twelve divine sons are the earliest servants and loyal supporters of him who followed him.

Although, the old master also has a lot of ideas, we don't agree, but ...... Cough! Young master, old master, can he come back? ”

"Uncle Muzi, Ping An doesn't lie to you, the place I said is a real existence, there is nothing to hide, whether Master Tian can come back or not, it's really hard to say, maybe you can! Maybe find what he's looking for!

There are really no gods in the world! Perhaps, there is another space, this I believe! When a person's speed exceeds light, there will be a distortion of space! I call it a wormhole!

There may be a chance to enter other spaces. In another world, this may be what you are after! And not the gods! Although, there are still many things that Ping An himself does not understand! However, peace is really not a god.

I'm afraid of pain, I like to enjoy, I like beautiful women! Loved the delicious food! Cut off the head of Ping'an, Ping'an will die as well, have you ever seen a god who will die?

Ping An knows, you are very suspicious of my appearance, but Ping An really has no way to tell you, it's not that I'm lying to you, it's that Ping An himself hasn't figured it out!

Later, you'll figure it out! Perhaps, understanding is not necessarily better than now! Forget it, Uncle Muzi, let's not talk about this, last time your magic barrier frightened Ping'an, don't you dare to do it again!

By the way, when are you going to do it with Wu Niang?

Look at the day! This Aunt Wang is good at it, yes, find Aunt Wang, let her be a matchmaker, is Ming Media marrying, no matchmaker is not like words......

"Well, what about people?" Liu Ao patronized and spoke, and as soon as he looked up, the person was gone!

In Chang'an City, the national teacher Yuan Tiangang enjoyed the cool last night in the pavilion of the National Teacher's Mansion! It was cloudy and starless! And Yuan Tiangang's mind was full of stars!

Suddenly, I felt that the nebula I was familiar with before was not moving in the right direction! When did it change?

At this time, Yuan Tiangang stood up with a "whew", looked at the dark night sky, and couldn't wait to blow away the clouds and see clearly!

With a peachwood sword on his back, a hollow heel turned out of the gazebo and danced in the clearing! While dancing, he couldn't stop calling the direction.

Dance for a while, and suddenly stop fighting! And the direction is the "Click1" thunder and lightning ...... Luoyang direction, reflecting Yuan Tiangang's eyes closed and sweaty face. Under the three wisps of black beard, his mouth couldn't stop shaking...... (To be continued.) )

PS: It's Friday again, and I wish you all a happy heart! The chessboard in the cold is still rushing to the draft! Ask for collections, ask for subscriptions, well, although I didn't ask for a monthly pass, I lost a few of them! Dizzy~ It seems that you can't ask for it! Say it to the one who begged for a monthly pass!