[Serious statement, please do not imitate the methods mentioned in this chapter in reality]

The situation is extremely critical, Zheng Yuanyuan may fall down at any time, and the firefighters don’t know how long it will take to arrive. Liu Chen is not sure whether there is an inflatable cushion in a small place like Qingzhou in 2003.

At this moment, the students watching below were buzzing like headless flies, and no one knew what to do.

After all, Liu Chen was mature. When he saw this situation, he felt that he had the responsibility to do something. He changed his mind and made a rough calculation and knew it.

There are many flowers and trees in front of the Science and Technology Museum, all bought from the flower and tree base next door. Most of them are flowers, plants and shrubs, and the buffer coefficient is much stronger than that of cement floors.

The first time he rushed over to move flowers and trees, the other students were stunned and couldn't understand what he was doing. They just looked at Zheng Yuanyuan above and exclaimed. The power of a person was limited. Liu Chen exclaimed: "You are not here to help?"

Du Ning rushed up to help for the first time, but he didn't understand what this is.

"Flowers and trees can increase buffering, and a few more people come to help!"

Everyone looked at each other, and finally a few more people helped and moved the flowers and trees below together. Liu Chen felt that it was still not possible. If he jumped down with such a large amount of force, it would be great to stab it into his body, but at least he could save his life.

Something must be made!

Looking around, there was a girls' dormitory building on the side of the Science and Technology Museum. Girls love to clean. Today's sunshine is very good, with colorful quilts and sheets on it. They waved to a few brothers who were helping and ran over. The trust these people had in Liu Chen in a short time ran over with a greeting.

Just as the other male classmates were stunned, Liu Chen brought all the colorful quilts and sheets with these rough men, and laid several layers on the flowers and trees to increase buffer.

After doing this, Liu Chen and others were sweating profusely. Only then did they feel at ease. Even if this kid who was dying fell, he would be injured, and he would definitely not be able to kill him.

However, according to the rough calculation just now, these buffers are probably not enough. Seeing that there were still two quilts and some quilts, Liu Chen quickly took action and tied the two quilts with quilts to the four corners, allowing the two big boys to grab one corner respectively.

At this moment, other students also knew that Liu Chen had a solution. More people came up to help, and five boys were pulled at one corner. The two quilts were stacked on top of flowers and trees about 30 cm apart, and the four corners were tightened.

After adopting these buffering methods, Liu Chen finally felt relieved. He wiped the sweat from his forehead and looked up. Zheng Yuanyuan was still very excited on the surface. After thinking for a moment, he rushed up.

There is no elevator in this science and technology museum. When I rushed to the roof, my legs were so tired that I shivered.

There were five classmates standing on the roof, and Witch Gu was there too, which surprised Liu Chen. Witch Gu was even more surprised when he saw Liu Chen, but now he didn't have time to settle the score with him.

It turns out that Witch Gu is also a Chinese teacher in Class 7 and is quite familiar with Zheng Yuanyuan. The head teacher of Class 7 doesn’t know where to go, because he is still afraid that Zheng Yuanyuan will be more exciting.

"Student Zheng Yuanyuan, don't be excited. There are still two months left, everything is still possible." Witch Gu shouted, and the other students also agreed, "That's right, Yuanyuan, you come down first."

Zheng Yuanyuan shouted at the top of his lungs: "It's useless, it's not useful at all. For three years, I have worked hard, but my grades have always been very poor. I have tried all the methods, but they have no effect. I'm not this material. I'm sorry to my mother, I'm sorry to my sister. I'm dragging them down. I deserve to die..."

"Student from the distance, you are still so young, don't be overwhelmed. You have never experienced the beauty of college. You can read and study freely, and you will no longer have the pressure of the college entrance examination, and there is also a beautiful love..."

Before Gu Witch finished speaking, Zheng Yuanyuan waved his arm and almost couldn't stand firmly and fell down. There was another scream of exclamation below, and he shouted: "I can't get into college, I can't get into college at all..." The veins on his neck could be seen clearly.

Gu Yuan didn't know what else to say, but a lot of comforting words were useless, which made Zheng Yuanyuan even more excited.

How could I say that college stimulated him at this time? I really don’t know whether Witch Gu was anxious or stupid. Liu Chen didn’t care about it either. He pulled her back and shouted, “Shut up and stand up obediently.”

At this moment, it was definitely the attitude of Dr. Niu, Dazhao, of Jianghai University, towards the elementary school girl who just entered the laboratory.

Witch Gu was confused. She never expected that the students in the class would dare to scold her like this, but she didn't react for a while and stood obediently behind.

"If I had good grades, it would be great. I could get into college and get scholarships. My mother and sister wouldn't have to work so hard to save the college fees for me. In the end, I couldn't even get into college..."

When Liu Chen heard this, he knew that his thinking had completely entered a dead end, and it was useless to comfort him at this moment.

Liu Chen could not be calm about such an urgent matter, but he had died once, and his mentality was much calmer than that of ordinary people. He walked forward slowly with a calm face.

"You idiot, are you still blaming others if you can't get into college? You didn't study well by yourself!" Liu Chen cursed.

These people have always comforted him, and Zheng Yuanyuan was a little uncomfortable with this scolding.

"Do you think you're dead? Look below."

Zheng Yuanyuan looked down buzzingly, his body shook again, and he almost fell down, but fortunately he stood firm.

Seeing the quilt pulled up below, he didn't know what Liu Chen meant.

"I've learned the momentum theorem. Can you calculate the impact if you jump like this?"

Zheng Yuanyuan learned too hard and was stupid. When he talked about the momentum theorem, he instinctively thought about what it was, looking at the sky and thinking blankly.

Two firefighters and principal Sun Shuren came up at this time. One of the non-commissioned officers was in his thirties and saw the situation and made a gesture to let Liu Chen continue. They went around to the side of the sphere to climb up to save the person.

"Isn't the momentum theorem the impulse equal to the change in momentum?" Zheng Yuanyuan was a little confused.

"What is the impact?" Liu Chen asked loudly.

“The product of force and time.”

"What is the change in momentum?"

Zheng Yuanyuan struggled to think. After reading it, Liu Chen understood why he spent so much time but his grades were so poor. He couldn't even get through such basic concepts. What's the use of doing more questions?

"The product of mass and velocity change."

"You are standing at a height of 20 meters and falling to 1.5 meters. What is your speed?" Liu Chen asked.

Several other classmates and Witch Gu were stunned. Liu Chen actually gave Zheng Yuanyuan physics questions on the spot. This guy who was crazy and crazy at any time was actually following his ideas to do the questions!

Incredible.

The two firefighters had already climbed up secretly and were about to stand firm to catch Zheng Yuanyuan. Zheng Yuanyuan had a headache thinking, and when he saw them, he immediately trembled all over.
Chapter completed!