In the afternoon, there was a physics class, and the physics teacher was on the podium and gave everyone a difficult problem.

He wrote on the blackboard: There is an inclined plane with an inclination angle of θ, and at the bottom of which a baffle M is fixed, and there are three wooden blocks A, B, and C, whose masses are mA=mB=m, mC=3m, respectively, and the dynamic friction factor between them and the inclined plane is the same. Wherein wooden block A is connected with a light spring and placed on the inclined plane, and is connected with baffle plate M by light spring, as shown in the figure. At the beginning, block A is stationary at P and the spring is in a state of natural elongation. Block B moves downward at the initial velocity v0 at point Q, and the distance between P and Q is L. It is known that Block B moves in a uniform straight line during the downward slide, and immediately moves downward together after touching Block A, but it does not stick, and they move upwards after reaching a lowest point, and Block B moves upwards just to return to the Q point. If block A is stationary at point P, block C starts from point Q and moves downward at an initial velocity of 2v, undergoes the same process, and finally block C stops at point R on the inclined plane, and the distance between P and R is found L′.

When the board book was finished, the physics teacher was a little proud, "This problem is not solved by ordinary people." Is there anyone in your class who can figure it out? ”

The students looked at each other one after another, scratching their heads and cheeks one by one. This question is too profound to be within their knowledge.

The physics teacher said, "I don't blame you. I don't think anyone in the whole higher level can answer this question. ”

"Not necessarily." The person who spoke was good morning Xia.

"This classmate, could it be that you would?"

"Hahaha." Xia Zao'an looked up to the sky and laughed, quite a bit heroic and heroic, but she immediately shook her head, "I won't either." ”

"Then what are you laughing at?" The old pedant of the physics teacher was speechless.

Xia Zao'an said: "I won't, it doesn't mean that no one in our class will." Now, let me introduce the representative of our class, Qi Mu! Wow! ”

The students immediately burst into applause.

Long Po, who was sleeping on the table and drooling, was woken up, and she was stupid when she saw the expectant eyes of her classmates.

Mikaka turned back to her, "Hey, it's time for you to play it again." Why don't you hurry up? ”

“……”

What a. Fake Qi Mu, that is, Long Po, don't mention how depressed she is. Although she imitated Qi Mu's face and Qi Mu's noodles, she couldn't imitate Qi Mu's Laotan sauerkraut taste! [Phew.] The author has placed ads again! In short, what Long Po hates the most is studying, she failed math in elementary school, let alone ask her to solve high school physics problems?!!

Damn. She was originally pretending to be Qi Mu, doing bad things, but she didn't think of pretending to be a scholar.

It's too hard for her.

But due to the warm applause of the audience, Long Po did not go on stage, and it is estimated that it will not work.

So she reluctantly walked up.

The physics teacher pushed his reading glasses, "You're Qi Mu?" I've heard of you. Last time you took the physics exam, you got a perfect score. Let me see what you're capable of. ”

He handed the chalk to Luang Po.

Long Po stood on the blackboard, staring at the question, her head a little dizzy.

Belch...... Silent.

Lasting silence.

The classrooms are quiet.

A cold sweat ran down Long Po's forehead.

Finished. She thought to herself, this can't be solved, and she can't get off the stage.

But...... She's just stupid. How could she come up with a way not to lose face?

Seeing that Long Po stood for a long time without moving, the physics teacher understood everything, with a smile on his lips.

"It seems that you won't be able to do this either. I didn't expect that. That's just the way the smartest people at the next level. Alright, you go back first. ”

With the teacher's approval, Long Po couldn't wait to put the chalk away, and then returned to her seat in a gloomy manner.

Seeing this, Xia Good Morning deliberately raised his voice, "Oh, even Qi Mu can't solve it, so this question is really difficult." ”

The fake Qi Mu's face was all lost.

The physics teacher returned to the podium and said, "It's normal that you can't solve it." I look at the students in your class, and that's it. ”

His tone was a little sarcastic. You must know that the physics teacher is the homeroom teacher of the next class, so he is deliberately embarrassing the first class.

"Teacher!" Suddenly, a small hand was raised, "If you don't mind, can you let me try?" ”

"You?" The physics teacher pushed his glasses and saw an elementary school student standing at the back of the classroom.

"You, a student in this class?"

Are you sure you're not a dwarf? The physics teacher almost wanted to say that.

Xiao Po shook his head, "I'm not a student in this class, but I will answer this question on your blackboard." ”

Hearing his words, the whole class was in an uproar.

A primary school student can actually solve high school physics problems? Lie!

Anyway, except for good morning Xia, no one believed it.

Even Mikaka didn't believe it. Although he knew that Xiao Po had some ability, he wouldn't be so smart. Unless it's a legendary genius boy?

The physics teacher was a little angry, "Little kid, don't talk big. Do you think it's playing? Also, how are you in this class, hurry home. ”

Xiao Po walked up slowly, "Teacher, don't rush me away yet." You see if I'm right first. ”

"Cut. If you can solve this problem, I'll show you a handstand! "The physics teacher didn't know how powerful Xiao Po was, and he dared to make such a bet. Think about his age, and he has to learn to do handstands......

Alas, we can only express our deep sympathy.

Xiao Po picked up the chalk, "Then it's a word." ”

With that, he began to write on the blackboard.

The physics teacher obviously didn't take him seriously, and while walking off the podium, he nagged to his classmates: "Don't learn from this child, you don't know how high the sky is." To be a man, you must be down-to-earth. Don't pretend to understand, it's really a big rice bucket. ”

As he was talking, Xia Zao'an pulled the corner of his clothes and pointed to the blackboard, "Teacher, he has finished answering." ”

"Ahh The physics teacher looked back.

Sure enough, Xiao Po has already finished answering the question. He clapped his hands and threw the chalk back.

The physics teacher walked up and looked at his answering process carefully, his mouth opening wider and wider.

Oh my God, this elementary school student has a perfect answer!

Moreover, Xiao Po also smiled provocatively and said to him: "Teacher, I will have two other algorithms." ”

“……”

The little ones now...... Can you go to heaven?

The physics teacher felt as if she was in a dream. He has been teaching all his life, and he has never met such a gifted child.

If you don't get it, this little ghost will win the Nobel Prize in the future!

"Teacher." Xiao Po walked up to the physics teacher with a smile, "Do you remember what you said?" I don't think I will break my promise! ”

"......" The physics teacher's beard trembled, and he wanted to cry, but he couldn't.

Unexpectedly, he was a well-respected and loved people's teacher, but he was planted in the hands of a little broken child.

It's a shame.

Whining. The physics teacher's mood at the moment is probably something that only Mikaka can deeply understand.

"Jingle bell!" As the bell rang for the end of class, a group of students gathered in the hallway, frantically watching the physics teacher do a handstand.

And Xiao Po put one hand in his trouser pocket and walked back from the podium coldly.

It's the physics teacher who is boring and has nothing to do with him.

Snort, this kid, it's too draggy. Long Po looked at Xiao Po who walked back, and felt very unhappy. Hey? Suddenly, she seemed to have noticed something. How is this little broken similar to the real Qimu?

A bold conjecture passed through Long Po's heart: This child will not have anything to do with Qi Mu.

Could he ...... It's Qi Mu's son who smashed ?!!

No, no, no, Qi Mu is only 17 years old, and this Xiao Po is about twelve years old, Qi Mu can't give birth to him when he is five years old.

Long Po gave up this nonsensical idea.

But she always felt that this little break was not simple, and a primary school student could actually answer a high school physics problem?

Maybe this kid ...... He has a powerful source power in him?

In order to verify his idea, Long Po waited for Xiao Po to come over, and secretly stretched out his foot to trip him. If he avoided it, then this little imp was not an ordinary person. Otherwise, Long Po's suspicion of him will be dispelled.

Of course, Xiao Po saw through Long Po's intentions.

She stretched out her feet just to test herself. Xiao Po thought about it, so he had to pretend not to see it, and he tripped over her, and the whole person fell to the ground with a puff.

"Oops. Kid, you didn't fall. The dragon woman pretended to help him up, and then took the opportunity to put a charm on his back.

This spell, if you encounter someone with high source power, will spontaneously combust.

"Thank you, brother. I'm fine. Xiao Po stood up, patted his knee, but said coldly in his heart: Spellmaster, I'll clean you up later.

"It's okay." Long Po said as she stole a look at the reaction of the spell.

The charm is good and decent, and there is no spontaneous combustion.

In other words, this little ghost has no source power on him.

Whew, it's just an ordinary little ghost, at most it's just a little clever.

Thinking like this, Long Po was also relieved.

However, Mikaka and they are going to save Ye Wuwu tonight? Hehe, we must not let them succeed.