Chapter 700 Kinetics (for the third year class of the second class Li Goudan plus more)

"Sissi, what are you doing?" At this time, Chen Dabao's son Chen Haoxuan saw that Qianqian's side seemed to be done, so he was curious.

"Paper airplanes!" Sissi replied.

"Hey, I thought it was, we all made paper airplanes in class, and my dad made kites for me, and I can fly very high." Chen Haoxuan said proudly, his words full of superiority.

It's just that Chen Dabao is not so happy at this time, he bought the materials online, although there are instructions, but he is clumsy at this time, and he can't understand these complicated materials according to the instructions.

"I did it myself, Su Su said that I could fly for a long time, and we had two of them, which was different from what we did in class." Sissi said.

"Sissi, the plane you made doesn't look like anything special to me." At this time, Xiao Qingxi also came over and said.

Xiao Qingxi's mother smiled apologetically, but she also seemed to think that Su Chen was a little perfunctory, folding a paper airplane and estimating that Su Chen was so perfunctory in the audience.

Sissi was a little saddened by being said, and Su Chen hurriedly comforted, "Sissi, let's go outside to fly and see, the plane is for flying, not for seeing." ”

"Hmm!" Sissi ignored them and walked out of the classroom with her paper airplane.

Chen Haoxuan and Xiao Qingxi also followed, Zhu Siwan and Li Jingyi also walked out of the classroom to see Qianqian's works, and the other children saw that the teacher had come out, and they all followed out curiously.

"Is Susu flying here?" Walked to the empty playground and asked.

"Well, here it is." Su Chen smiled, Su Chen was very confident in his paper airplane.

But just as Sissi was about to throw the plane, she was stopped by Su Chen, "It's not like this, you see I'll show you it." ”

After Su Chen finished speaking, he picked up the paper airplane he folded, held the plane in his right hand, took a breath, slowly squatted down, and when he squatted to the deepest point, he suddenly spun and jumped up, and threw the plane out at an angle with an elevation angle greater than sixty degrees.

The paper airplane took off into the air, and at first the plane was no different, but when it seemed that the plane was about to fall, the plane circled and flew again.

Five seconds have passed, the plane is still flying, ten seconds have passed, the plane is still flying, fifteen seconds have passed, and the plane has not yet fallen.

"Wow. This plane has been flying for a long time! ”

"This plane is amazing!"

"Still flying!"

The plane kept circling and flying, and it took about 20 seconds before the plane slowly landed.

The eyes of the children present widened, and even teachers like Zhu Siwan were a little surprised.

After all, the paper airplanes they folded generally flew for a few seconds and fell, how could anyone like Su Chen fly for nearly half a minute.

"I'm going to fly, I'm going to fly!" Sissi saw that this plane was so powerful, she couldn't hold it anymore.

"Good!" Su Chen picked up his paper airplane back, and then watched Sissi fly, Sissi picked up the plane she folded herself and made a gesture to fly, and slowly squatted down like Su Chen.

"Wait a minute." Su Chen stopped.

"What's wrong?" Sissi was puzzled.

"Take a breath of air to the plane before flying!" Su Chen said.

Before flying, he breathed at the plane, this was the soul action of flying a paper plane, without it, Su Chen felt that it was imperfect.

In fact, from the perspective of physics, the small nose of the paper airplane can reduce the drag, but it also makes the weight of the nose too light and the mass of the fuselage uneven.

According to aerodynamics, the wet nose of the airplane is slightly heavier, which can keep the fuselage in balance, and the heated nose can also keep the paper airplane in the air for a longer time.

However, Su Chen would not explain these to Sissi, and she didn't understand them.

Sissi listened to Su Chen, sighed at the plane, her heart was full of anticipation, and she threw the paper airplane out after learning Su Chen's movements, but Sissi's strength was a little small, and the plane only flew for about ten seconds.

But it's been flying much longer than they're usually fought.

"Dad, I want paper airplanes too."

"Mom, I'm going to fold that paper airplane too." At this time, there are more and more children watching, and there are even many children who are about to shout about to fold.

At this time, a middle-aged man walked towards Su Chen, "Hello, I'm Chu Mo's father." ”

"Hello." Su Chen smiled, muttering in his heart how he looked different from on TV.

"Can you tell me how to fold that paper airplane? My daughter wants to learn. Papa Bear pointed to Xiong Chumo, who was shining next to him, and said.

Su Chen glanced at Sissi, who was surrounded by the children in the class at the moment to learn how to fold this kind of airplane.

The children, who had just been dismissive of it, have now become enthusiastic fans of this paper airplane.

The parents who thought that Su Chen was a perfunctory child before also admired Su Chen at this moment.

Don't look at a small paper airplane, there is a lot of knowledge here.

None of the parents present had never played with paper airplanes, and it was precisely because they had all played with paper airplanes that they knew what a great thing it was to make a paper airplane fly in the air for more than 20 seconds.

Su Chen also used the knowledge of physics to strengthen the air performance of paper airplanes, and the scientific name of paper airplanes was originally "physical model of autonomous power aerodynamics".

As the saying goes, everything is knowledgeable, and who would have thought that a small paper airplane would use the knowledge of aerodynamics.

Because of a test flight of the plane, Sissi has become a popular figure in the school, and now Sissi is busy explaining to various friends how to fold the plane.

Some parents who were embarrassed to crowd into the group of children also came to Su Chen to ask for advice on how to fold the plane, and Su Chen also taught generously.

In the end, due to the fact that there were too many people to learn, Su Chen decided to teach this method to the teachers at the school, and then let the teachers demonstrate it to the students in the classroom.

A parent-child handicraft activity, because of Su Chen's appearance, it became an origami airplane activity.

Happy times are always fast, the parent-teacher meeting is over, the parents have left with their children, but Su Chen and Sissi are squatting in a fence.

Because Sissi was too excited when she threw the paper airplane, she threw away all the car keys that Su Chen had played with her before.

The place where the car key fell was just outside the fence of the kindergarten, and the other side of the fence seemed to be a yard, and I don't know what it was for.

Su Chen was holding a branch and picking up the car keys, while Sissi was squatting next to cheer Su Chen on.

Li Jingyi saw Su Chen and Qian Qian on the fence behind the school, and she didn't know what they were doing, so she walked over curiously.

Then Li Jingyi saw the scene of Su Chen picking up the car keys.

The stick was not long enough, Su Chen had already stretched out his hand to the longest, and it was almost enough, Su Chen pushed out the place where he held the stick in his hand a little, increasing the length of the stick, but the place where the handle was held was too short, and the place where he focused was too small, and the stick fell directly outside the fence.

Seeing this, Li Jingyi was about to go to the utility room to get a broom and bring it over to Su Chen.

It's just that at this time, Qian Qian easily passed through the fence with her body, ran outside the fence and picked up the stick that Su Chen had just dropped and returned it to Su Chen, and then continued to squat next to watch Su Chen pick up the key.

"Thank you!" Su Chen took the stick and said thank you, ready to continue teasing, but felt that something was wrong.

"Poof." At this time, Li Jingyi behind her laughed.

Su Chen also suddenly realized that Sissi could drill through, what else did she have to provoke, just let Sissi go over and pick it up.

Su Chen felt anxious about his IQ, and the key scene was still seen, should he kill people and kill him?