Live Future 2000

Chapter 24 One Problem Is Easier Than One Problem

Additional Question [-]: "We can see such a scene in various explosion scenes in movies: a chimney that is falling will break itself in two during the process of falling. The fracture will appear in the chimney. What position?"

"I know the answer to this question!"

Wang Dazhuang raised his hand almost immediately after the three of them read the topic.

Raise your hand, really raise your hand.

Zhou Mi looked at Wang Dazhuang who was actively speaking with a twitching face, and could only nod to signal him to speak.

"The break is in the middle!"

Wang Dazhuang's tone was firm, as if he had read the answer.

"Why?" Zhou Mi asked.

"This question doesn't say why, anyway, I'm sure it's in the middle."

"why?"

Since Zhou Mi asked two whys in succession, Wang Dazhuang couldn't help but used a routine at Zhou Mi: "Do you know which animal likes to ask why?"

In Wang Dazhuang's view, Zhou Mi, a top student, does homework every day. If she doesn't do homework, she just works to make money. This kind of routine must be accurate.

But even if Zhou Mi has never seen this episode, her IQ can quickly analyze that this is definitely a routine, and it is still a very old routine!

So he replied speechlessly: "I don't know."

"It's a pig!" Wang Dazhuang shouted excitedly.

"Oh." Zhou Mi responded calmly.

Um?This is playing cards out of routine.Shouldn't the correct answer be to ask "why?"Then, everything will be a matter of course!

The depressed Wang Dazhuang couldn't help asking: "Don't you want to know why?"

"Do not want to."

"why?"

"."

Zhou Mi twitched her lips, looked at Wang Dazhuang sadly, then looked him up and down, and nodded in approval.

Li Lechen, on the other hand, was already bursting out laughing, clutching his stomach and almost unable to straighten up.

Stealing chickens won't make you lose rice, and you can't beat a fox to make a show. Anyway, Wang Dazhuang has a deep understanding. When the Chinese test papers come out and apply these idioms, he can definitely show his own experience.

Back to the topic.

Zhou Mi also continued to be serious: "This question will definitely not be broken in the middle. This is a very complicated mechanics question, which should involve angular velocity. But we haven't learned the angular velocity yet. Maybe we can build a mathematical model and use Solve it in high numbers."

I probably didn't learn high mathematics.

"Why don't you do this question first? Let's do the math test first?" Li Lechen suggested, "Multiple-choice questions and fill-in-the-blank questions are faster."

"I have done those questions, it doesn't matter if I do it or not." Zhou Mi said frankly.

It didn't matter whether Zhou Mi did the questions or not, but it didn't matter to Li Lechen, he was still waiting to copy them.

After finishing speaking, Zhou Mi didn't waste any more time, and immediately entered a series of problem-solving modes exclusive to academic masters, such as drawing pictures, force analysis, and formulating formulas.

However, this question is indeed quite difficult. After three to four minutes of calculations by Zhou Mi, she finally overthrew it and started all over again.Afterwards, he turned to the book and looked up the formula.

Li Lechen became anxious.

"Is this question so difficult?!" Li Lechen suddenly shouted loudly.

[It's not difficult, it's not difficult, this knowledge point is 865 items in "Ten Trillion Whys"]

[Isn't it two-thirds, what a simple question]

[Yes, two-thirds]

[Don't just give the answer, the anchor needs to explain]

[It's very simple. Before breaking, the entire chimney was obviously falling at the same angular velocity.Considering the top of the chimney, due to the influence of its own gravity, it should have fallen faster, but it was forcibly "pulled" back to the same angular velocity as the lower part of the chimney, which caused the chimney to finally break. The calculation shows that the break will occur at 2/3 of the chimney]

【This is what the force diagram looks like.】

【If you use angular velocity to calculate, you need to use the formula.】

[This problem can also be solved by mathematical methods, without drawing force diagrams, as long as. 】

For Li Lechen's sudden question, the audience in the live broadcast room immediately responded, not only immediately giving the correct answer, but also various detailed explanations.

Ignore the detailed explanations that are completely incomprehensible for the time being.

"Isn't it just two-thirds? How can it be as complicated as what you did?" Li Lechen followed what he said just now, and quickly "plagiarized" the answer to the barrage.

"puff--"

This time it was Wang Dazhuang's turn to laugh: "You are not as good as half of me. Do you think it is more accurate to say two-thirds? Then I guess three-fifths."

"It's two-thirds, I'm sure." Li Lechen said angrily after throwing a sharp glance at Wang Dazhuang.

For the problem about flies just now, Zhou Mi still has some clues, but this chimney broken problem, if you don’t figure it out from the beginning to the end, Zhou Mi can’t figure out whether it will be two-thirds or three-fifths, or even not. It could be [-]/[-], or some complex answer with a root sign.

Seeing that Zhou Mi also showed disbelief, Wang Dazhuang became more confident: "I said that there is a theoretical basis for breaking at half, because the gravitational acceleration of any object on the earth is the same. The strength is the same, so naturally it will be broken in the middle, tell me how you guessed two-thirds of it?"

At first glance, Wang Dazhuang is already close to the theoretical level of Xueba.

Li Lechen didn't bother to say anything.

In fact, he couldn't read the names of those complicated formulas, various symbols, and so on. He could only recognize addition, subtraction, multiplication, division, and Arabic numerals, plus alpha and beta at most.

Since you can't read it, just write it directly.

So I brushed and painted gourds on the manuscript.

I can't read or understand, but I can still copy.This is a must-have skill for a scumbag.

"Oh, that's right!" Li Lechen suddenly stopped writing halfway and looked up at Zhou Mi.

Zhou Mi, who was watching it vigorously, immediately became confused, and finally deeply realized what it feels like to get what you want.

Li Lechen sighed unhurriedly: "It takes too much time to do this question, I'm afraid it will be too late, or I will give it to you when I go back, you can copy the multiple choice questions of other test papers for us first. "

"I took pictures of the other questions for you at night, oh no, you can just take my test paper and copy it." Zhou Mi said without hesitation, "Hurry up and finish this question!"

"Alright then." Li Lechen shrugged, as if he was still reluctant.In fact, he was already happy in his heart.

Because of the exchange chips, Li Lechen continued to copy the solutions in the bullet screen eloquently. There are as many as four or five kinds. After studying a lot of professional formulas in engineering blasting, the final answer points to two-thirds.

At a time like this, Zhou Mi should have cherished the time and quickly completed the filling in the blanks of the remaining test papers, but she was so surprised that she was so hungry for so many solutions.

(End of this chapter)