Teacher Song slapped the table again, and the students immediately fell silent.

His arms exposed outside his sleeves were a little black, they should have been exposed to the sun, he felt like he had done farm work, and his arms were also very powerful, and the table was banging, but he was born a teacher, and he still taught Gewu.

Glancing around the classroom again, he spoke:

"Let me introduce myself first, I am Song Zhongzhi, and you all know it, I am your Mr. Gewu, and the purpose of my teaching in the academy is to cultivate talents for the country."

"Although I am not your chief teacher, I still have to say what I should say, and I advise you to study seriously in the future and become a useful person to the society.

"Just like the motto of the Whampoa Military Academy, please go elsewhere for promotion and wealth, and be greedy for life and fear of death and enter Simen by mistake. If you come to the new-style school just to gild your academic qualifications, then you should feel ashamed because you wasted a place in the new-style school. ”

Hearing this, Bao Guowei found that this teacher was still very patriotic.

"Today can be said to be everyone's first day of school."

"First of all, please remember that for all my courses, there is no need to stand up and say hello in the future, there is no point except for wasting time."

"Second, before class every day, I hope that when I enter the classroom, I can see everyone sitting quietly in their seats reading a book, instead of being as noisy as today."

"Third, if there is something you don't understand in class, you can raise your hand to ask questions, don't have any psychological burden, I am very happy to answer your questions, the only thing to remember is not to interject casually during my lecture."

Instructor Song seems to be a real person, doing practical things, and doesn't like to be a fool of things, Bao Guowei secretly wrote down his personality characteristics.

After saying these words, Instructor Song picked up the book and walked under the podium, looking like he was about to start lecturing.

"The essence of Western physics begins with the combination of Newton's three laws and arithmetic."

"What are Newton's three laws...... Turn to the first page of the main text of your Gemonoshu. ”

The teacher's voice landed, and the classroom resounded with the sound of flipping books.

"Newton's first law: Any object, at least as you may think of it at this stage, henceforth as a particle, must remain in a uniform linear motion or at rest until an external force forces it to change its state of motion."

In this era, people's thinking is somewhat conservative, and most of the students feel a little difficult to understand when they look at this sentence, and Teacher Song also gives everyone time to think about this sentence.

A male student sitting in the southeast corner raised his hand, apparently to ask a question, this person is Bao Guowei, he has already seen the teacher's temperament, and is willing to ask questions to win his favor.

"Bao Guowei, what are you going to do!"

Guo Chun had long suffered from Gewu sleep disorder, as soon as he heard Newton's law, he immediately became drowsy, and was covering his head with his hand to cover his eyes and prepare to take a nap, when he suddenly saw Bao Guowei raise his hand out of the corner of his eye, and was shocked, how could Bao Guowei raise his hand in a good way?

"I'm going to pretend!"

Bao Guowei replied softly, Guo Chun didn't understand what pretending to be was, but he could probably understand what he meant.

Instructor Song saw Bao Guowei at a glance, raised his hand to him, and motioned for him to stand up.

Bao Guowei stood up, the chair rubbed against the ground and made a somewhat sharp sound, and the classmates who were looking at Gewushu noticed him.

"Sir, I just imagined that there seems to be nothing in the world that is not subjected to force, right?"

Teacher Song was about to talk about this point, and when he heard that the student could ask this question, it was convenient for him, and he was a little happy in his heart, he nodded, and did not answer immediately, but continued to give the other students time to think about the first question.

After a long time, he spoke:

"The question raised by this student is very good, and the students should have noticed that there is indeed no such object in nature, and the objects that are not subject to force only exist in the imagination of human beings."

Bao Guowei once again asked a question:

"I've heard that Gewu is a discipline based on experiments, and since there is no such object, it is naturally impossible to make experiments, and since it is impossible to make experiments, how did this theorem come about?"

That's a good question! Newton's first law is not derived from experiments alone, but is derived from scientific reasoning on the basis of experiments. It cannot be directly verified by experiments, but it has been tested by practice and is one of the basic laws of mechanics recognized by everyone. ”

"Therefore, there is another name for Gewuxue, which is called physics."

The instructor picked up the chalk and wanted to write down two big physics words to express his feelings, but when he turned his head, he found that the blackboard was full of words, a trigonometric table was drawn on the left, and a trigonometric figure expression was written on the right.

This handwriting is still relatively new, and it should not have been left over from last semester, not to mention that it is still written at the beginning of the new textbook "General Geometry".

"Why hasn't this blackboard been wiped yet? Did your teacher teach you yesterday? ”

Teacher Song turned to the students and asked.

"That's right! Mr. Shen gave us an arithmetic lesson in the afternoon of school! It's really ......."

"Yesterday was supposed to be a class for work! As a result, Mr. Shen didn't go to work and changed to an arithmetic class, and just after the start of school, he said that our progress was lagging behind! ”

"We were almost fined for copying the theorem 300 times on the first day of school! It's really horrible! ”

"If it weren't for Bao Guowei, we wouldn't have been able to sleep last night, I'm afraid we would have to copy books until midnight!"

Most of the students still have some resentment about what happened yesterday, and when they talk about Mr. Shen, the students can't help but want to complain, and chirp.

As a teacher of the fourth class of the first grade, Instructor Song naturally knew that the homeroom teacher and arithmetic teacher of this class was Mr. Shen, and it was not the first time he had taken a class with Instructor Shen, and he knew that it was really the style of Lao Shen to do so.

Picking up the blackboard eraser, Mr. Song was about to erase the words on the blackboard, but when he looked at the words, he suddenly realized that something was wrong.

Although Lao Shen's handwriting is not the same as that of a dog, it is not so square and beautiful.

Teacher Song was a little curious, since it was not written by Mr. Shen, then who should write it, it can't be written by students, right?

"The words on this blackboard shouldn't have been written by Teacher Shen, right?"

The instructor asked casually, which immediately caused several "Bao Fu" to be excited.

"It's Bao Guowei! Bao Guowei! Written by Bao Guowei! ”

"Mr. Shen didn't make it difficult for him if he wanted to, he answered all three theorems, and he wrote them all on the blackboard."

Several students explained.

"Bao Guowei? Who is it? Stand up and let me see? ”

Instructor Song was a little curious, and everyone's eyes looked at Bao Guowei, who had already stood up.

Because Mr. Shen was so lazy, he didn't even arrange the duty schedule yesterday, so no one wiped the blackboard, resulting in Bao Guowei now being forced to pretend to be a second time again.

"Okay, it seems that this student's foundation is very good, and the two questions he just asked are also very good, you sit down, and we will continue the lecture."

Instructor Song didn't say anything, he still had to catch up with the class, but he just praised casually, put his hand down, and motioned for Bao Guowei to sit down directly.

"Regarding the question that the classmate just asked, there is a little experiment on page 37 of our book."

The students all turned to this page, full of pictures and texts, drawing things like cars and wooden blocks, and a large paragraph of explanation text, which made people dizzy when they looked at it.

"Let's take a look at this experiment: instruments and equipment: a square slider, a small wooden stick about 20 centimeters long, a small ball, an experimental trolley, a planed wooden board about 10-15 centimeters wide and about 30 centimeters and 60 centimeters long and of the same thickness, a towel and a cotton cloth each."

Teacher Song began to chant the scriptures......

"The second law is that the magnitude of the acceleration of an object is proportional to the force at work, inversely proportional to the mass of the object, and proportional to the reciprocal of the mass of the object; The direction of acceleration is the same as that of the applied force. ”

……

"The third law is that the forces of action and reaction between two interacting objects are always equal in magnitude and in opposite directions, acting on the same straight line."

……

Approaching the end of class, many students' brains are already a little buzzing, and Niu Yi's small experiment alone has stumped many people, and then the second law and the third law will be talked about. Something like "vector", "instantaneous", "equivalence inequality" and so on was introduced.

I also learned a bunch of Western alphabet expressions, and I heard that Niu Er and Niu San also had small experiments, and it was also a picture followed by a lot of explanations, and people who looked at it were dizzy......

"Okay, look at the time and the class is about to end, this class is here, I have just explained Newton's three laws to the students, please do this exercise, I will take it and check it after the next class."

Instructor Song took a stack of handouts and randomly found a student and sent them down.

When he got his hands on it, Bao Guowei looked at the questions on this piece of paper, all of which were about some theorem and judgment questions of Newton's three laws, experimental process questions, and a lot of word games were played, but for him, it was really pediatrics.

Not long after the handouts were distributed, Zhong Xuan sounded, it can be regarded as the end of class, and it is estimated that there is an hour and a half in a science class, and Mr. Song is gone, and the students are relieved.

Bao Guowei was about to take Guo Chun and Chen Jinhua to go to the toilet together, when the classmate in the front seat turned around with a handout.

"Bao Guowei, do you know this question? I don't quite understand. ”

Bao Guowei recognized her, this female classmate's name is An Shuzhen, and on the day of school, he and Guo Chun and Chen Jinhua helped her carry her luggage.