Since ancient times, talented people have been born in the Red Chamber

Chapter 490 It's Not Magic, It's Not Magic, It's Science (Second)

Chapter 489

"Can you lift heavy objects?" Wang Yang asked Zhao Ji.

After Zhao Ji thought for a while, he raised a finger. "One hundred catties is no problem, if it is more, I'm afraid it will be hard."

"That's all right, Qilang, you lead two people to fetch a steel ingot weighing [-] jin, and bring a large scale by the way." Wang Yang directed to Wu Qilang.

Zhao Ji looked at Wang Yang in confusion. He really didn't understand what the old driver wanted to do, so he quickly declared loudly. "Three hundred kilograms? Sir, what are you doing? Even if I use the strength of feeding, I can lift up to 150 kilograms. If it's more, I won't be able to lift it."

"Hey, why are you so anxious, is it possible that I can still put the three hundred catties on you? Then you will know the magical effect of this pulley block. Now, please forgive me for keeping it secret for the time being."

After a short time, Wu Qilang and the others came to Wang Yang's office with [-] catties of steel ingots each carrying [-] catties of steel ingots.

In addition, the large iron hooks and large scales that Wang Yang needed were brought.Wang Yang first let Wu Qilang stand on the table, nailed the iron hook to the strong beam, and then hung a large pulley on it, brought hemp rope, and started to wear it. Over the pulley...

Zhao Ji can be said to be confused, but the problem is that Wang Yang just didn't tell him, just let him wait and see the result.After all the pulleys were done, a sturdy bamboo basket for steel ingots was hung on the bottom pulley hook.

Although the three hundred kilograms of steel ingots were heavy, their volume was not very large. After the three hundred kilograms of steel ingots were loaded into the sturdy bamboo basket, there was even room left.

Wang Yang tilted his head towards Zhao Ji. "How about it? Let's try it first. Is the bamboo basket heavy enough for three hundred catties?"

"Me?" Zhao Ji pointed to the tip of his nose, and looked at Wang Yang in disbelief, as if he had just snatched a dog.

"Your Highness, I just asked you to try it, and didn't say that you must pick it up." Wang Yang encouraged with a smile.

In the end, Zhao Ji had no choice but to step forward, and then stood in front of the bamboo basket and started to exert force. Well, Zhao Ji's little face was as red as the monkey's butt, but there was no way to lift the bamboo basket. .

"It can't be done, it really can't be done. Three hundred catties must weigh three hundred catties. There is absolutely no doubt about it." Zhao Ji, who seemed a little out of breath after trying several times, stepped back and supported the case, panting for breath.

"Then Your Highness, please try to pull this rope again to see if you can lift the steel ingot weighing three hundred catties." The smile on Wang Yang's face still looked so mysterious.

"Still playing? No, no, sir, I really can't bring it up." Zhao Ji almost rolled his eyes and fainted.

"Your Highness, you can do it, just like me, one up, one down, one up, one down... You see, how simple and easy it is, just up and down like this." Wang Yang continued to maintain a mysterious smile, Then began to pull the rope.

Then, Zhao Ji saw that Wang Yang was pulling the rope that passed through the pulley block with only one hand.And the bamboo basket containing the [-]-jin steel ingot was so light that it went up and down like nothing.

Seeing Zhao Ji's eyes stared at the Big Wild Goose Pagoda in Chang'an. "You, you can juggle?"

"You can try it and you will know whether it is a trick or not. Come on, Your Highness, you can do it." Wang Yang waved to Zhao Ji.

This time, no matter how impolite Zhao Ji was, he rushed to Wang Yang with big strides, took the rope, pulled it up, and then saw the basket of bamboo that almost made his shit come out just now, but he couldn't lift it. The basket seemed to weigh only a few dozen catties.

With a little effort, you can see that the bamboo basket weighing three hundred catties gradually left the ground and was picked up by yourself.Zhao Ji let go with a dazed expression.With a muffled bang, the bamboo basket hit the floor hard, startling all three people in the room.

Zhao Ji apologized repeatedly in embarrassment, and then went over to pick up the bamboo basket in his hand in disbelief, and the bamboo basket was still unshakable.But when he pulled the rope again, the bamboo basket lifted off the ground again.

"This, isn't this a trick but a demon technique?!" Zhao Ji felt that he was about to lose control of himself.What the hell, can you actually be a demon?

"Wrong, this is neither magic tricks nor magic tricks, but physics." After shaking his head slowly, Wang Yang raised his index finger with a very serious expression, and said very solemnly.

"What the hell is physics?" Zhao Ji looked at Wang Yang with a confused face, feeling more and more that the idol he admired seemed to have a halo shining behind him.

"Physics is a subject that studies the most general laws of material motion and the basic structure of matter. Its theoretical structure fully uses mathematics as its working language, and uses experiments as the sole criterion for testing the correctness of the theory. It is the most sophisticated natural science today. Science." Wang Yang explained in a very experienced way.

Just like the gray-haired old teacher when I first came into contact with physics in junior high school. "And this pulley set is a practical experience in physics."

"The pulley block is a simple machine assembled from multiple movable pulleys and fixed pulleys. It can save labor and change the direction of force. The labor saving of the pulley block is determined by the number of rope strands, and its mechanical efficiency is determined by the gravity of the object being pulled and the gravity of the movable pulley. And friction and other decisions."

Seeing that Zhao Ji still looked confused, Wang Yang couldn't help sighing softly, then walked to the side, took out a book, walked up to Zhao Ji and handed it to him.

""Mojing"? Does this thing have anything to do with this physics?"

"Look for yourself. There is a record about pulleys in the "Mojing", and Wang also got the source of inspiration from it, and copied the pulleys that Mozi and the others used at that time."

In 380 BC, Mo Mo Di (known as Mozi) and his disciples wrote the book "Mo Jing" about pulleys.

And it is recorded in detail in the inside that the pulley with a fixed central axis is called a fixed pulley, which is a deformed equal arm lever, which does not save effort but can change the direction of force.

The pulley whose central axis moves with the weight is called a moving pulley, which is a deformed unequal arm lever, which can save half the force, but does not change the direction of the force.

In practice, a certain number of movable pulleys and fixed pulleys are often combined into various forms of pulley blocks.The pulley block not only saves effort but also can change the direction of force.

However, since hundreds of schools of thought were deposed and Confucianism was the sole focus, many scientific classics were gradually lost in the dust. Because this place is the weapons supervisor and is related to Baigong, so such books appear here.

(End of this chapter)