Wang Xiang looked at the countdown on the phone screen, and when there were only three seconds left, he smiled. After resurrecting with full blood this time, you can go on a killing spree, haha!

Finally, there was no countdown interface, and Wang Xiang began to launch a full-scale attack. "Whoever dares to attack our crystal, I will let him have no return. Come one to kill one, come two to kill a pair. ”

According to Wang Xiang's previous habits, he would never pay attention to the map in the upper left corner of his phone. It's not because of anything else, it's that I don't care about it at all. Wang Xiang doesn't have three eyes like Erlang God, one is used to look at the characters in the game, the other controls the buttons at the bottom right of the interface, and the third eye looks at the map.

But today, Wang Xiang subconsciously glanced in the direction of the map. It didn't matter if he looked at it, it almost made Wang Xiang vomit blood angrily.

The classmate was still staring at the question, silent. Looking at his demeanor, it seems that he will not stop if he is puzzled. But time is passing minute by minute, and the situation of his pen has not appeared for a long time.

If it weren't for Cheng Biting's good temper, it would be very likely that he would directly greet "Wing Chun".

"Li Min, will you or won't? It's almost time for class, you don't look tired, I look tired! Cheng Biting Tie couldn't stand it anymore, he had to say something at this time. Otherwise, you might see that it's dark.

"What, what did you just call me, Li Min? Don't be funny, I'm not Li Min. That classmate was stunned at the time, did he look like he had won the first prize in the competition?

"You're not Li Min, so why did you lie to me just now that you are, answer me quickly?" The green tendons on his forehead have been exposed, and Cheng Tie is not lightly angry.

The classmate just smiled slightly, and I had no way of knowing if I was in the city, and said, "Alas, Cheng Biting Tie, can you be reasonable?" I mean, if only I were Li Min, I didn't say that I was Li Min. What I'm talking about is just a hypothesis, hypothesis, do you understand? I just said, I want to be a person like Li Min, you just talk about the wind and the sun, and let me do the question. If I refuse, you'll look down on me. If I hadn't refused, I wouldn't have been able to do that question! After thinking about it, I think it would be better to do it, but what if it does? ”

Cheng Tie's teeth were already gritting, and his face became much paler than just now, "You, deceived my feelings." Whoever pleads with you today is useless. You, eat me a Wing Chun Shaolin Luohan boxing. ”

"Stop." There was a crisp voice at the door, but it sounded very familiar. "Cheng Biting Tie, the person you are looking for is me, I am Li Min. What stumped you, let me take a look. ”

Looking at Li Hu who was not moving on the map, Wang Xiang, who was angry, was itching all over. "Li Hu, you are standing in a military posture, why are you standing there and not moving, the enemy has already attacked our crystal, you should also hurry up."

"Wang Xiang, Brother Xiang, don't be angry, we have something to say, my phone is out of battery." Li Hu also mustered up the courage to finally say these unspeakable words.

After listening to the words, Wang Xiang stopped talking. He fainted, and the phone fell to the ground with a "bump" along the arc of his arm, and the screen was shattered instantly.

You must know that Wang Xiang spent a lot of money to buy a skin, ready to go to the silver rank. Unexpectedly, he and bronze are so fateful.

"Hey, Brother Xiang, wake up, don't scare me." Li Hu's tears had rolled down his cheeks, but he seemed to be completely unaware, still shaking Wang Xiang in a coma.

It took less than 30 seconds for Li Min to finish reading the question. Bring me the pen and paper, and I'm going to start showing my skills.

As soon as they heard that Li Min was going to start the problem, many girls in the class came over, and they also wanted to see how Xueba solved this problem.

Seeing that Zhao Liyang, his tablemate, also followed other girls to join in the fun, Niu Zihao sighed deeply, the first prize in the physics competition, is his charm so great? Forget it, I'll go to my Gao Yaxuan and discuss the script of "Jing Ke's Assassination of the King of Qin" with her.

Gao Yaxuan is not here, so where will she go? Niu Zihao looked at the students surrounding Li Min and couldn't help but shake his head. The water is impassable, the crowd is crowded, I can only describe it like this.

First, we need to perform a force analysis on point A. I won't write the word "solution", not because of trouble, but because it's completely unnecessary, and when you take the exam, remember to write it.

As shown in the figure, the following can be obtained from the title:

F(OA)=G/cos∝，F(AB)=Gta

∝, after writing these two formulas, Li Min deliberately emphasized them. What does this mean when it comes to the knowledge of trigonometric functions in mathematics? Explain that mathematics and physics have a complementary relationship, if you don't even understand the basic knowledge of trigonometric functions, then this problem, even if you know how to list formulas, it will be useless.

Sine (si

), cosine (cos), tangent (ta

These three concepts are all we have learned in junior high school, and if you don't know how to do it, you can go to the previous textbooks, which have a detailed explanation process, here, I just talk about it roughly.

Let OA break first, then F(OA)=20√3N. Therefore, the OA rope can be pulled at an angle of 30 degrees to the vertical direction.

Many classmates couldn't understand it, especially girls.

In order to make it understandable to everyone, Li Min then drew a sketch. Those who don't understand, after reading the picture drawn by Li Min, suddenly realized. It turns out that this is the case, what kind of Olympiad problems, in fact, it is quite simple.

Li Min started the final summary again, and after the summary, this chapter is estimated to be almost over.

The general solution to this type of problem is to assume that a rope breaks first, that is, the maximum tension it has endured, and then determine whether the other rope has broken. If it is not broken, then this value is the result: if another rope has been broken, that is, the force experienced at this time has been greater than its maximum bearing force, then another rope needs to be selected as the research object and solved again.

After Li Min finished solving this question, the whole class burst into thunderous applause. At the same time, Wang Xiang also woke up from the shadow of the failure of the king's glory.

"Brother Xiang, you're finally awake!" Li Hu was crying on the side, and the frightened Wang Xiang almost passed out again.