Water Margin farming to become powerful

Chapter 309 Little Yuchi Lectures on Physics
The fat man stretched his waist while enjoying the servant's service. When he straightened his waist and saw Zhu Biao and Zeng Sheng, he showed a flattering smile, and then turned around and said to his servant angrily. : "Why don't you bring me my clothes quickly?"

"Hey." The boy waited for him to put on his shoes and quickly went to bring him clothes, but the fat man didn't even want to get up, so he opened his hands and the boy hurriedly put on the military uniform for him.

Zeng Sheng went to Zhu Biao's side and whispered: "Leave him alone, let's go out and gather."

Zhu Biao nodded, feeling extremely contemptuous in his heart. Although he wanted to fight hard with Sun Xin and wanted to catch up with others, not all the students who came to the University of Supervisory Council had the same idea.

For example, this fat man's surname is Zhao, and his name is Zhao Fa. He is the nephew of Yuanwai Zhao, who co-founded the Dengzhou Spinning Mill with Sun Xin. Yuanwai Zhao has no children. Arrogant and indulgent, now this Zhao Fa has lived to the age of 19, obese, short and fat, and lives in rich clothes and good food all day long.

This time it was Zhao Yuanwai who heard that Sun Xin was going to run a Supervisory Council University, and wanted to work for his nephew to join the Supervisory Council, so he recommended Zhao Fa to study in the school through his quota of supervisors in the Supervisory Council.

This Zhao Fa doesn't have the temperament of Zhu Biao and Zeng Sheng. He usually eats too much and is lazy, and he always bosses around his subordinates.

The adults in his family don't discipline them very much. Even Zhao Yuanwai, knowing that his child's temperament is unstable and usually needs someone to take care of him, directly squeezed out a young farmer from his supervisory committee who could have come to school when recommending him. Recommended A young boy who hired his nephew took the place of the farmer, just to serve Zhao Fa in the school.

After Zhao Fa arrived at the school and participated in a day of military training, he said he couldn't stand it. At this time, Sun Xin had already gone to Zengtou City, and the senior military officers in charge of the school couldn't keep an eye on it all the time. The present instructor handles it.

In the beginning, the instructors in the school also tried to persuade Zhao Fa to obey the discipline, and even invited political cadres to have a heart-to-heart meeting with him, but Zhao Fa ignored him at all.

After he came back, he said to Zhu Biao with a sneer on his face: "What political cadre? He was just the first long-term worker in my village before. He participated in the protection army and won several battles and was promoted. Now he is shaking and pretending to be Come and teach me a lesson!"

Since then, Zhao Fa relied on his family's power, so he evaded training from time to time, and even ordered the son of another landlord who slept with him to change berths with his servant, specifically to let his servant Living in the dormitory is convenient for taking care of your daily life.The son of the landlord's family was afraid of Zhao Yuanwai's influence, so he agreed.

Zhu Biao and Zeng Sheng came to the playground to assemble and were already standing in line. At this time, Zhao Facai and his own boy slowly appeared at the end of the line.

The instructor has long been accustomed to Zhao Fa's fatigue. Although he was angry, he had no choice but to ask Zhao Fa to stand aside for punishment due to the identity of the opponent. At this time, he saw a large group of people coming in front of him. Zhu Biao took a closer look Only then did I realize that Lu Zhishen, the principal of the Supervisory Council University, and Luan Tingyu, the brigade commander of the Protection Army, were all present, and then saw that some people in workers' uniforms also appeared at the side, and I was a little surprised.

At this time, the instructors in front began to speak to everyone, and everyone realized that the physics class that Sun Xin taught today was not only for their students and students from other departments to attend the class together, but also for the industrial and military departments under the jurisdiction of Sunjiazhuang. All leaders are also present.

Zhu Biao glanced quietly, and found that Lu Zhishen and Luan Tingyu had their hands behind their backs, and each of them was holding a notebook for taking notes behind their hands. He couldn't help being curious.

Everyone just queued up and walked to the largest auditorium in the school. They said that the auditorium was actually just a big room with a thatched roof. More than 100 people quickly crowded into the room. After such a long time of collective education, even though he was sweating hotly, he sat quietly in the room without saying a word.

Not long after everyone was done, Sun Xin came into the room from the front with a dealer. When Sun Xin came to class, he didn't open the book and talk to everyone first, but asked the two dealers to put a bunch of things on the stage. On top of the podium.

Zhu Biao and the others took a closer look, but there were two triangular wooden slopes.

Sun Xin waited for them to arrange the two opposite slant boards before speaking loudly to everyone: "Today we are talking about physics class. The so-called physics research is the principle of all things. To do work, you must study this knowledge. I have already listed the lecture notes for the physics class, and I will teach you this semester, and I will teach you some classes later or if I don’t have time.”

As he spoke, he picked up a piece of lime from the podium and wrote the word "inertia" on the blackboard.

Sun Xin casually tapped two dots under the two words with lime, and glanced down the stage, and saw Zhu Biao sitting in the front row at a glance.

The corner of Sun Xin's mouth evoked a smile, "Zhu Biao stand up!"

The half month of training made Zhu Biao subconsciously stand up when he heard the password. After standing up straight, Zhu Biao felt a little regretful. I don't know how Sun Xin wanted to entertain him.

Sun Xin took out a fist-sized wooden ball from his bag and put it on the podium, and asked Zhu Biao, "How can this ball move?"

Zhu Biao was taken aback for a moment, thinking that this guy is just playing with himself?

However, after half a month of training, he had already thickened his skin a lot, not afraid of Sun Xin's ridicule, and replied loudly: "If someone pushes, it will move."

Sun Xin nodded, put the ball on the ground and pushed it forward, and the ball rolled straight without stopping.

"The ball is rolling forward at this time, and no one is pushing it, why can it keep moving?"

Zhu Biao didn't know what Sun Xin was doing, so he replied truthfully: "That's because you pushed it before and haven't used up all your strength. After it runs for a while, it will stop immediately."

Sun Xin nodded and asked Zhu Biao to sit down and said to everyone: "You also think that the ball will roll forward only when someone exerts force, and it will stop when there is no force?"

Everyone present nodded, including Luan Tingyu and Lu Zhishen who were sitting in front of them also thought so.

Sun Xin asked the banker to put the two slope props on the ground. The auditorium has a very wide podium, and although there are hundreds of people present, they can clearly see the situation on the podium.

Sun Xin asked the banker to draw a line on the slope on the left, and then put the ball at the height of that line. As soon as he let go, the ball rolled down until it lost its kinetic energy and stopped when it reached a certain height on the slope on the right. The dealer marked the final height of the ball on the slope on the right, and then asked the dealer to pull up a level ruler.

Everyone looked at it and saw that the height where the ball fell was equal to the height it finally reached.

Sun Xin said with a smile to everyone: "You must be able to see how high the slope the ball is dropped from, and how high it will climb to stop when it finally stops."

This explanation is similar to everyone's life experience, and everyone can easily accept it and nod for a while.

At this time, Sun Xin asked someone to bring another slope prop. The slope of this slope is shorter than the previous one, but the length of the slope is longer. Sun Xin replaced the higher one on the left with this smaller slope. the slope.

"Now the slopes of the two slopes are different. If I still drop the ball at the same height of the slope on the right, do you think it will slide to the same height of the slope on the left?"

Everyone looked at this scene and felt that Sun Xin's method of using props to do teaching experiments was very novel. Several bold students replied loudly: "Yes."

Everyone nodded, and Sun Xin tried again. Sure enough, this time the ball went down the big slope on the left, then rushed up the small slope on the right, and did not go back until it reached the same height as the downhill.

Sun Xin asked a farmer to bring a measuring tape, first measured the slope distance that the ball climbed up first, and then measured the distance that the ball climbed up the slope for the second time.

Because the slope of the second slope is gentler, the distance traveled by the ball is more than twice that of the first slope.

At this time, Sun Xin asked the banker to bring a third and gentler slope to replace the second slope. He called Zhu Biao and said, "Do you think the ball I put down at the same height is on the third slope?" How far can it run?

Zhu Biao also thought it was fun watching Sun Xin do the experiment, but he was dissatisfied with Sun Xin in his heart, thinking that he had already understood what Sun Xin wanted to teach, thinking that Sun Xin really thought he didn't understand, and said loudly: " Naturally, it will stop when you return to the same height where you let go on the slope, and it will run as far as it can reach that height.”

Sun Xin nodded and put the ball down from the same height. Sure enough, as Zhu Biao said, the ball didn't turn back and run down until it climbed to the same height on another slope.

But at this time, Sun Xin didn't let Zhu Biao sit down, but asked him: "Since you think that the ball must run to the same height before it stops when it is dropped from the height of the slope, the gentler the slope we use It’s going to run farther, so if I put it down from such a height and put a flat plate instead of another slope on the opposite side of the slope, how far will the ball run?”

"This..." Zhu Biao was about to answer when he opened his mouth, but suddenly froze.

Some of the students present have been thinking along Sun Xin's train of thought.

Luan Tingyu thought for a while, opened his mouth wide, and looked at the experimental equipment on Sun Xin's podium with surprise on his face. Lu Zhishen touched his beard and frowned in thought. Some of the classmates gradually understood, and they all fell into horror.

Inevitably, some students who didn't understand it very well saw the students next to them who were still full of enthusiasm, suddenly full of doubts, and curiously asked what was going on?

Sun Xin looked at Zhu Biao, and found that Zhu Biao was speechless, obviously unable to think of any reasonable explanation.

Sun Xin laughed and said his answer loudly: "No matter how high the ball comes down from, it will eventually return to the same height, but if there is a flat plate in front of the slope, the ball will go straight to Running forward, but finding that no matter how far you run, it is impossible to reach the same height, it will keep running forward and never stop, this is inertia!"

In fact, some people have already thought of this answer just now, but this answer is too shocking!
A small ball that never stops is something that has never existed in everyone's thinking, so even if someone has thought of the answer just now, they dare not say it, but feel that they are wrong.

But at this time, when Sun Xin categorically stated the conclusion, everyone opened their mouths in shock!
(End of this chapter)