Xueba's Sea of ​​Stars

Chapter 56 Is She A Good Person?
Assume that the centers of mass of the truck and the heavy object are located at x and x respectively before braking; after braking, the truck has moved a distance of s to a complete stop, and the two centers of mass are located at x'=x+s and x=x+s+L respectively.So there is
Δx=Mx'+mx' of M+m-Mx+mx of M+m=(M+m)s+ML=v of 2ug
From this we get:

s=2ug of v-M+m of mL
"Hey...GG, the momentum theorem is a bit of a break, and there is not enough time to check it."

Wu Bin raised his head and let out a long sigh, rubbing his temples.

At this time, Gu Fan stretched his head over and took a look at the densely packed 40 lines of calculations on the scratch paper on Wu Bin's desk, took a deep breath and said, "Did I really study physics?"

"Well, you have learned it, but you haven't learned this yet." Wu Bin nodded.

"Then I really hope I never learn this, what is this? A rematch question?"

"No, it's a painful memory." Wu Bin shook his head.

"Snake spirit." Gu Fan rolled his eyes at him.

When Wu Bin first returned to the classroom, the students originally planned to throw flowers for him to celebrate, but seeing Wu Bin's dazed look, they decided to watch him quietly.

After the fourth class in the afternoon, Zhang Qiu ran to Wu Bin and asked, "I'm just curious about the questions for the rematch. If you're not in the mood to say something, I'll get out of here right away."

"Look for yourself." Wu Bin handed several pieces of draft paper to Zhang Qiu.

"Thank you."

After Zhang Qiu finished speaking, he took the draft paper and looked at it with a solemn expression.

"En... um, um~ oh~ hiss..."

"You are singing opera." Gu Fan complained, who couldn't stand Zhang Qiu's strange tone.

But Zhang Qiu didn't pay attention to Gu Fan, he just put some draft paper back on Wu Bin's desk, left a word before turning and leaving.

"Just pretend that I... haven't studied competition."

This made Gu Fan amused, and said with a smile, "It turns out I'm not the only one who can't understand the co-author."

"Wu Bin, do you want to have dinner?" Xu Hao and Wang Qi came over and asked.

"Go first, I'll come over later."

Xu Hao and Wang Qi looked at each other, nodded, and stopped asking.

"Let's go, let's go, I heard that there is a lion head coming today." Gu Fan pushed the two of them, and walked out of the classroom together.

Wu Bin, who was alone in the classroom, raised his head, closed his eyes, and fell into deep thought.

After all, it was his first time to participate in a competitive game, and his desire to win was unprecedentedly high.

Compete with others for rankings, and after winning, break into the next round for a more intense fight. What can stimulate hormones more than this?
'Maybe next time I...'

"Hey, Wu Bin."

Wu Bin just started thinking, a voice suddenly interrupted her, and he was shocked. After all, he thought that there was no one in the class.

"People are scary, scary to death, classmate." Wu Bin opened his eyes and looked at Pei Jiamin in front of him and said.

Pei Jiamin smiled embarrassedly after hearing this, "Sorry, I thought you heard my footsteps."

"Is there something wrong?" Wu Bin sat up straight and asked.

"Well, I just want to say something, I admire you for being able to enter the semi-finals of the competition." Pei Jiamin said while looking at the door of the classroom from the corner of her eye, for fear that other students would return to the classroom like her.

Although even if some classmates came back, she could only see her chatting with Wu Bin far away, but she still felt her heart beating very fast.

"Russ... Actually, there is nothing to admire."

Hearing from Pei Jiamin that she admired him, Wu Bin was still a little confused. Why did this woman suddenly change her gender?

"Actually, when I was in the freshman year of high school, I also thought about participating in the math competition, but the school didn't pay much attention to the competition, and I couldn't balance the competition and normal study." When there was no one, he continued, "So when my test scores fell for the first time, my teacher and my mother came to persuade me to study hard and not to think about competing."

"Huh? Your grades have declined? Has there ever been such a period?"

In Wu Bin's impression, this female school bully has always been at the top of the class.

"Yes, during the mid-term exam in the first year of high school, I dropped from the 8th in the grade to the 17th in the grade."

"Oh."

Nodding his head and saying "oh" expressionlessly, Wu Bin only had "hehe! '

Seeing Wu Bin nodding, Pei Jiamin went on to say: "At that time I gave in, I gave up the competition and started to concentrate on my studies, so when I heard that you broke into the semi-finals of the physics competition, I felt admiration, because you did it Things I didn't do.

Before Wu Bin could respond, Pei Jiamin suddenly took out a can of iced Coke from behind and stuffed it into Wu Bin's hand, and said, "When you have troubles, drinking something iced will make you feel better."

"Thank you." Wu Bin felt the coldness on the can of Coke and nodded.

"I believe that as long as you continue to work hard like this, you will succeed."

After finishing speaking, Pei Jiamin ran out of the classroom like flying, her whole face flushed red.

"What's the situation..." Wu Bin who scratched his hair was puzzled.

'Perhaps she... is a nice person? '

'After all, she said she admired me, ahahahahaha!It seems that I finally know how powerful I am. '

After thinking about it, Wu Bin pulled the pull tab of the Coke, and took a few sips of "gul" and "gul".

"Phew...it seems to be a little more comfortable. Well, I can return her a bottle tomorrow."

Wu Bin, who was in a better mood, walked out of the classroom slowly with a Coke and walked towards the cafeteria.

……

On the third day, Wu Bin went to Mingguang Middle School to take the experimental test.

One of the two experimental questions is the observation of the spectrum, and the other is the measurement of the magnetic field using the Hall effect, both of which are included in the "Experimental Instructions".

Wu Bin, who is the "ghost" of the experimental question, naturally did it easily and smoothly, and the invigilators couldn't help nodding secretly when they saw it.

'40 points should be solid. '

After taking a deep breath, Wu Bin thought in his heart.

After returning to school, Wu Bin did not slack off in the physics competition because he might not be able to enter the provincial team. Instead, he became more obsessed with studying. Gu Fan, who was obsessed until noon and wanted to ask him two questions, was not very good at opening his mouth. .

Because Wu Bin exudes an aura that strangers should not enter and acquaintances should not come near.

Particle kinematics, conservation of momentum, conservation of mechanical energy, conservation of angular momentum, rigid body mechanics, etc., Wu Bin once thought he understood things, and now he has to study them again.

Just because he is not strong enough!

(End of this chapter)