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Solution: (1) The pressure of the car on the road surface in actual operation is:

F=G total = m total g = 12000 kgx10N / kg = 12000O N.

The contact area between the car and the road surface S=6x0.02㎡=0.12㎡.

The pressure of the car on the road: 10Pa>7x10Pa, exceeding the industry standard.

(2) The pressure of an overloaded car on the road greatly exceeds the industry standard and exceeds the maximum pressure that the road can bear, so the overload of the car will damage the road.

(Mass is a measure of inertia. The greater the mass, the greater the inertia. If the truck is overweight, the braking (braking) distance will increase, which will easily cause a rear-end collision.)
……

Chengguo answered the question step by step on the blackboard. The writing was beautiful and elegant, which made the physics teacher nod repeatedly.

Obviously, she was very satisfied with Chengguo's answers, and she smiled gratifiedly throughout the whole process.

When Cheng Guo turned around and handed the marker pen to the physics teacher, her childish loli voice said: "Teacher, I finished writing."

"Well, let's go back and do it." The physics teacher nodded, and after Chengguo took his seat, he asked everyone, "Do you think Chengguo's answer is correct?"

"Correct!"

The whole class shouted in unison.

"Then who can tell me why it is right?" The physics teacher asked again.

A courageous boy blurted out: "Because Cheng Guo is a beautiful talented girl!"

"Hahaha!"

Everyone burst into laughter.

However, it is undeniable that Chengguo is not only good-looking, but also has excellent academic performance.

Every teacher gave her a cute nickname: Little Candy.

"Okay everyone, now the teacher will explain the question about Little Candy."

The physics teacher waved his hand to signal everyone to be quiet, then turned to look at the elegant words and answers on the blackboard, and continued, "As for these two questions, Chengguo answered perfectly!"

"If it were put on the exam, the answer to this question would be impeccable, and there would be no flaws!"

Immediately afterwards, the physics teacher explained to the students why the solution to this problem is like this.

Two classes, spent in a relaxed learning atmosphere.

Cheng Guo had been waiting for those girls to come to find her, but she didn't see her until the end of biology class.

Xu Jiaxing looked at the time, and it was 5 minutes before school was over, so he became more nervous and said, "Guoguo, hurry home after school, I'm afraid they will make trouble for you during school time."

Cheng Guo said nonchalantly, "It's okay Xing Xing, if you're worried, go back first, I can handle it by myself!"

Drip ring...

Soon.

The bell rang for the end of get out of class, and the biology teacher stood on the podium table and said with a smile: "Students, get out of class is over!"

"Crash!"

The students in the group had already packed their schoolbags, and then ran towards the door in a hive.

Cheng Guo tidied up the desk without haste, and Xu Jiaxing was not in a hurry to leave.

The biology teacher also packed up his class materials and walked out of the classroom.

soon.

There were dozens of people in the class, but only a dozen or so scattered remained.

Tuk Tuk Tuk…

There were loud footsteps at the door.

Xu Jiaxing was always paying attention to the door, so he immediately noticed seven or eight girls walking towards the classroom.

The commotion was also intentionally so loud that all the students in the class couldn't help but watch.

When they saw the person coming, the faces of the students in the class suddenly changed.

Some students knew each other well, and they said they were troublemakers from Class Seven, rather than female hooligans.

"It's Lin Shuyuan!"

"Why is she here again, Chengguo won't be able to escape."

"It's really deceiving, let's tell the teacher!"

The classmates in the class are still very concerned about Chengguo, and everyone is very nervous for her.

When a girl was about to leave to inform the teacher, she was stopped by one of Lin Shuyuan's followers.

"Until Sister Lin's matter is resolved, no one can leave the class!"

With an arrogant expression and a domineering tone, it's just like playing Young and Dangerous.

At a young age, if you don't learn from the good, you will learn from the bad.

Cheng Guo looked at Lin Shuyuan, who was walking towards her with a smile.

buzzing...

The phone vibrated at this time, Chengguo looked at the incoming call, it was Christine calling.

Another text message popped up on the side.

"Guoguo, I'm at school, I'll go find you right away!"

Cheng Guo didn't return, because Lin Shuyuan came to the front, pushed Xu Jiaxing away with one hand and said, "Go away!"

Xu Jiaxing was pushed back a few steps, and then saw Lin Shuyuan staring at Chengguo aggressively, feeling flustered, she didn't know whether she should step forward to help Chengguo, but she couldn't muster up the courage.

After all, the other party was notorious in school, and he was a grade older than them, and his aura was enough to make people afraid.

Cheng Guo and Lin Shuyuan looked at each other in the same way, and they really deserved each other.

"You are Chengguo?" Lin Shuyuan stepped on the stool and asked knowingly.

"Student, we don't know each other, right?" Cheng Guo picked up her schoolbag, and then continued: "Excuse me, I want to go out."

When she walked out of the seat, she was stopped by Lin Shuyuan, and then pressed her on the seat, and said, "I ask you, why do you seduce Yan Chengfeng?"

Cheng Guo laughed after hearing this.

Because she is so cute, even if she smiles a little indifferently now, it still gives people a sweet feeling, and she can't tell that she is angry at all.

"I said classmate, if you are jealous, then I'm sorry, you go to Yan Chengfeng, don't come to me." Cheng Guo said with disdain: "I never flirt with others, let alone be interested in men, understand Please let me go, I'm in a hurry."

Cheng Guo didn't want to be rough, and tried to stand up from the seat again after speaking, intending to leave, but was stopped by more people.

"Hey, Lin Shuyuan, don't bully our Guoguo!" A boy stood up at this moment and said, "We have already told the class teacher, she will come here soon, if you don't want to be punished, I advise you to leave quickly! "

However, Lin Shuyuan couldn't find an outlet to vent her anger. Seeing this boy dare to stand up, she walked over and kicked him in the thigh.

The boy yelped in pain, and backed away again and again.

Lin Shuyuan said contemptuously: "Do you think I will be afraid when you call the teacher? If you talk nonsense, I will beat you to a disability!"

Cheng Guo shook her head secretly in her heart, the brat now is really daring, she doesn't know what fear is at all.

"Why do you bully them?"

At this time, Cheng Guo's voice suddenly came out, slightly choked with sobs.

Lin Shuyuan and the others looked at Chengguo again, only to find that there were crystal tears in Chengguo's big eyes.

Seeing this, Lin Shuyuan's heart skipped a beat.

Her heart softened in an instant, and she didn't know why, as if she had made a huge mistake.

"That..." Lin Shuyuan panicked, looked at Cheng Guo who was about to cry, and hurriedly said: "Don't cry, I didn't hit you, why are you crying?"

Cheng Guo watched the other party's expression change, and knew that her innate skills had played a role.

The lovely and pitiful Cheng Guo is even more lovable, not to mention Lin Shuyuan, even the hard-hearted people will be influenced by her.

The active skill being cute is not a sin, but it is also activated faintly, making Chengguo look cute, and at the same time, the appearance of tears flowing in the eyes makes everyone panic.

"Hey, how can you do this, can you stop crying?" Lin Shuyuan was at a loss.

The girls who came with Lin Shuyuan also felt that it was too much for them to bully Guoguo so much, so they said: "Sister Lin, are we going too far, or let's just let it go ?”

……