Xueba, I beg you to go and escort him quickly!

Xu Heng, "Look at your actual situation and learn from each other's strengths to make up for your weaknesses. The most important thing is to be able to go to college! Don't worry about arts and sciences!"

Sometimes, the earnest words of adults are useless, but the words of their peers can always benefit them.

Because peers understand peers.

"The liberal arts are good, and there are many girls. When I go to university, there are more high-quality girls!"

"Science, good job? Boys' preschool education has become very popular in recent years!"

Several people were dumbfounded, "Xu Heng, have you studied it before? So we all choose liberal arts?"

Xu Heng, "Bad! Each has advantages and disadvantages, it depends on how you weigh them!"

"The most important thing, the most important thing is that you have to go to university first!"

"Let me put it this way, you have an advantage in liberal arts, so why bother to go to science to join in the fun and become cannon fodder?"

"Originally, you could get into a good school with your liberal arts grades, but you chose science, and the gains outweighed the losses, and your test scores were even worse. You couldn't even go to university. What kind of job are you talking about?"

"On the contrary, it's the same! You obviously have excellent calculation skills, so you can memorize them by rote every day, is it possible?"

Several people also smiled.

"We all understand the truth! But it's not as intuitive as you said!"

"Yes! Xu Heng..."

"Xu Heng? Hello? This guy, is he silent?"

"Fell asleep?"

"Fuck! I want to say more! He just fell asleep?"

"This guy!"

"..."

Everyone had no choice but to end the topic.

"Forget it, let's do it! Let's talk tomorrow."

Xu Heng slept on purpose.

If the conversation continues like this, it will be fruitless all night.

He also doesn't give the roommates a clear choice, no one can decide what their own future looks like.

Their future is in their own hands!

The path you choose is your own responsibility!

The same goes for Yue Pingting, she is also very conflicted.

So I decided to call my parents tomorrow morning.

After dawn, Yue Pingting still washed up as usual, went to buy breakfast, and waited for Xu Heng.

After breakfast, Yue Pingting used Xu Heng's mobile phone to make a call.

Yue Pingting, "Mom! I want to ask. The school teacher notified me about my course selection. After the monthly exam, I will be divided into classes. I want to ask your opinion...  …"

"Our opinion?"

Yue Pingting, "Yes."

"If we have any opinions, ask Xu Heng! He says what he says! Listen to Xu Heng!"

Yue Pingting, "Ah? No, Mom! Shouldn't you give us advice? You, you?"

"Don't be annoying! Just listen to Xu Heng! Xu Heng is no one else! Be good! Hang up! Three!"

The other party is playing mahjong.

Yue Pingting seemed to hear Zhou Xiu'e's voice beside her.

"My mother and Aunt Zhou are playing mahjong?"

Passing the mobile phone to Xu Heng, Yue Pingting looked distressed, "My mother asked me to ask you and let you decide."

Xu Heng, "Do you personally prefer liberal arts or science?"

Yue Pingting looked at Xu Heng with a dazed expression, "I'm under a lot of pressure, and I don't want to affect you because of me."

Xu Heng, "That's it?"

Yue Pingting, "!!!"

"Be serious, okay? What do you mean by this?"

Xu Heng smiled, "I said you girl, you have a lot of thoughts, so I just want to ask, if I choose liberal arts or science, is there any change?"

"I……"

Yue Pingting was stunned, it really was.

Xu Heng is not biased.

More importantly, one day he really had enough fun and said that he wanted to find a university to escort him. Isn't it surrounded by countless universities?

"I choose science, I want to choose science!"

"Then Riko."

Xu Heng rubbed Yue Pingting's head.

……

A new week, a new physics class.

Xu Heng also borrowed from the math teacher's method.

Let the students choose their own topics and make their own questions.

Of course, every class Xu Heng will spare time to compare with his classmates.

The comparison is the problem-solving idea!

topic:

As shown in the figure, on a rough horizontal surface, there are two small balls with masses m1 and m2, connected by a light spring in the middle. The original length of the spring is L and the stiffness is k. The ball is in contact with the ground The coefficient of friction between them is u.

There is a horizontal pulling force F on a small ball with a mass of m2, which makes the two small balls move at a uniform acceleration. What is the distance between the two small balls at this time?

A.(m2F)/[(m1+m2)k]

B.(m1F)/[(m1+m2)k]

C.(m1F)/[(m1+m2)k]+L

D.(m2F)/[(m1+m2)k]+L

The person who came up to do this question is the representative of the whole class.

solution:

Consider the two balls as a whole, and get Fu(m1+m2)g=(m1+m2)a from Niu Er's law

Isolate m1, obtained by Niu Er:

T-um1g=m1a

According to Hooke's law: T=K△x

x=△x+L

So the final answer is: {m1F/[(m1+m2)k]}+L

It was neatly written on the blackboard.

Xu Heng asked, "Are you sure that the representative you sent and the way you wrote it is the answer you think is the simplest and most accurate?"

　　Everyone said in unison, "Yes!"

Tang Yongxue and Miao Tiantian also nodded seriously.

"Xu Heng! Can you give me a better idea for solving the problem?"

Xu Heng said, "Please remove it!"

"If you do this, you can't do it in a few minutes during the exam!"

"I'll teach you a formula, the formula of internal force."

The whole class was dumbfounded, "???"

Xu Heng wrote it down on the blackboard.

Xingkai font, the more you write, the more beautiful it is!

The students stared at it, thinking that Xu Heng's writing was more beautiful than the Chinese teacher's.

"This word is a pleasure to look at!"

Xu Heng, "Stop flattering me! Look at the question, look at the formula!"

T=[m1/(m1+m2)]F

Xu Heng, "You can calculate the elastic force. Once you have the elastic force, add L, and the answer is ready to come."

Everyone still looked complacent, and Xu Heng solved the problem.

"Five seconds, will it be done soon?"

Everyone opened their mouths wide in surprise.

"Wait...Xu Heng, this, this is..."

Just as the students were about to ask, Xu Heng continued, "If the time still feels long, then I have a faster method, the Special Value Method."

All the students, "Is he still there?!!!"

Everyone's scalps were numb, "Damn! Xu Heng, we don't think you're here to give lectures! You're here to show!"

Xu Heng ignored the group of people and said, "If m1 is set to 0, if the mass of the ball is 0, the spring has no length, so L will not change, but if m1 is 0, it means that all the insides are 0, then the option Among them, which one of the previous ones can get 0?"

Everyone was stunned.

What the hell! ! !

PS: Thank you [嘻嘻] [噗实亽甡] [Cao Wen] for the monthly pass!

Ask for support!Explosive update!Explosive update! .

Chapter 93

Physics get out of class is over.

Xu Heng's face looked overwhelmed.

"It's like this again! Hey..."

He sighed.

All the students wailed, "The Tao is one foot tall and the devil is ten feet tall!"

Xu Heng rolled his eyes at everyone, "You are still far behind!"

Everyone, "Be an individual! Xu Heng!"

They protested with their mouths, but their bodies are still very honest!

One by one, they are frantically studying Xu Heng's problem-solving ideas, and want to use these methods for their own use.

Even after class, only a handful of people leave to go to the toilet.

The class atmosphere is really great.

Xu Heng sat back and glanced at Yue Pingting.

Yue Pingting carefully digested Xu Heng's thinking on solving the problem.

It wasn't until the next class, when the teacher came in, that the students were relieved, put away the physics problems, and reluctantly took out the textbooks for this class.

Xu Heng lay down and continued to sleep on him.