Xueba God-level system

Just when everyone stood up, Meng Ke noticed that a student had sneaked in beside his seat.

I don't know if I don't look at it, but I was shocked when I saw it, she was actually a girl.

Shouldn't they have gone to the chemistry teacher's office, why are they back again?

Although there were too many small question marks in Meng Ke's head, he didn't dare to ask casually.If her boyfriend mistakenly thinks that she is trying to strike up a conversation, then troubles will follow.

Little did he know that the person sitting next to him was Wang Yan. ?

"Okay, students, let's start class. As for those students who are not here, please borrow your notes to copy when you have free time."

As he spoke, Niu Zihao wrote the word "elasticity" on the clean blackboard.

"Its definition, as well as its direction, are in the textbook, so I won't read it."

If you read it, it will almost waste a few minutes, but for him, it is completely unnecessary.

"Next, I will emphasize Hooke's law in elasticity."

"Hooke's Law, of course, was deduced by a man named Hooke. Its formula is, F=kx."

"The definition is that the elastic force of the spring is related to the deformation. The greater the deformation, the greater the elastic force. When the deformation disappears, the elastic force disappears."

"Pay attention to a few points. It must have elasticity to apply to Hooke's law. The F in the formula can also be written as F bomb. Secondly, the elasticity is directly proportional to the deformation."

"About the formula of proportionality, y=x, and proportional function, we have already covered it in the mathematics class of junior high school. Students who don't know it can use simple numbers 1, 2, and 3 to substitute into the formula. For example, 4=4, Use at least 3 points to draw a function image, and you can draw corresponding conclusions through careful observation."

"As for solving the problem, it is good to analyze the specific problem in detail."

"The k in the formula refers to the stiffness coefficient of the spring, and the unit is Newton per meter (N/m)."

Niu Zihao peeked under the podium, and many students had already fallen asleep.

It's no wonder that it's strange if you don't fall asleep when you talk about this rational issue in the afternoon.

"I'm calling a classmate, and I invite her to come to the blackboard to answer questions. Class flower, who is it?"

"Banhua, didn't you go to the office?"

"Is this student planning to fall in love? He is really courageous."

The students below were rustling, not knowing what they were talking about.

Only then did Niu Zihao realize that he had actually spoken out what was in his heart.But it doesn't matter, most of the students in the classroom are in a state of frozen thoughts, there is no need to worry about them.

At this time, Niu Zihao suddenly saw a scene, a little red among thousands of flowers.In the last row of the classroom, a girl was sitting.

"Miss, it's up to you to answer the question."

"Me?" Wang Yan pointed at herself, very surprised, this damn Niu Zihao must have done it on purpose.

Although she is not an authentic physics master, it is not a problem to solve a few problems.

When she walked onto the stage, Niu Zihao realized that the person far away in the sky but close in front of him was Wang Yan.

In order not to arouse the suspicion of the students below, he still decided to pretend not to know each other, which is actually the best.

"The formula F=kx, how can we calculate the unit of k through the known quantity, where x refers to the displacement in the elastic deformation."

"Huh, that's it, I can't trouble my girl." Wang Yan smiled, picked up the chalk, and directly wrote k=F/x, the unit of F is N, and the unit of x is m, so the unit of k is N/m.

Some students will specialize in rote memorization, but in fact it is not necessary at all. When they think flexibly in their minds, the answer will come out naturally.