"You ...... You ......"

Lin Xiufeng couldn't say a word angrily. pointed to the classmates in the classroom, and then looked at Li Zhen:

"Li Zhen, good you Li Zhen. This is your Kyushu Academy of Sciences, hehehe, I have seen it. Take your ignorance as a cost? Hehe, that's amazing. ”

Li Zhen had a calm face and sat there without saying a word.

Qin Enze was furious, and he also kicked over the table and stood up: "You are here for academic discussion, even if you say something wrong, we will cooperate with you because you are sent by the imperial court, and everyone doesn't want to hurt your face." But what qualifications do you have to say that Master Li is wrong here, and what qualifications do you have to accuse the Kyushu Academy of Sciences here? You're not admitting defeat, are you? You don't think you're wrong, do you? Okay, let me explain to you what you think is high-level academic, and what we see as low-end basics that can't be at the low-end. ”

After that, Qin Enze walked up to the podium with a cigarette gun, looked at Lin Xiufeng and said:

"I'm telling you, what you've been talking about in the whole class doesn't make sense. What else is the speed of free fall, which is determined by whose weight is large? I told you the theorem of free fall, and you remembered: the object is stationary when it starts falling, and the initial velocity V=0. If the initial velocity of the object is not 0, it cannot be considered a free fall, even if it falls vertically.

During the fall, the object is no longer subject to any external force, including air resistance, except by gravity.

Any object in free fall at the same height will fall for the same amount of time. ”

"Remember? Same. is the same. The acceleration of any object in free fall in the same place is the same, so the free fall motion in the same place is also the same. The speed of free fall will only change according to different geographical conditions. ”

When Lin Xiufeng heard this, he laughed wildly: "Hahaha, it's nonsense." We're going to do an experiment right now, and we don't have to do a validation, you can even think of it. The weight of the same volume of cotton and the same volume of iron is not the same. So is the speed of cotton free fall the same as the speed of iron free fall? Who told you about this stupid theory? ”

Lin Xiufeng looked at Li Zhen mockingly.

Qin Enze sighed helplessly: "How should I explain it to you." Your theory, no, should be Kyushu's overall cognition, in fact, it should have been overturned a long time ago, this is originally a self-contradictory law. ”

"Paradoxical? Hahaha, huh? Lin Xiufeng looked at Qin Enze with disdain.

Qin Enze sighed: "Okay, just take what you said, let's make a vision." If the weight of cotton is 4 catties and the weight of iron is 8 catties, the volume is the same. The acceleration of cotton descent is 4 and the acceleration of iron is 8. It looks like iron is going to land faster, right? ”

Lin Xiufeng nodded, sneered, and didn't speak. He wanted to see what this ugly bastard with a scarred face could say.

Qin Enze said again: "But have you ever thought about it. What if cotton and iron were tied together? Then, the acceleration of the iron, which is falling rapidly, will be dragged down by the cotton, and when the two are together, their uniform velocity will become the same. You're okay with that. ”

Lin Xiufeng imagined in his mind that cotton and iron were tied together, indeed, because they became one, although the speed of cotton was 4 and the speed of iron was 8, it would indeed become the same. Hey? Strange, how did it become the same again?

"Hehe, don't use this word game, brain teaser to reverse black and white. What does this prove? ”

Qin Enze slapped his thigh: "So." Still don't you understand? The velocity of cotton is 4, and the velocity of iron is 8. ”

Lin Xiufeng's face became suspicious: "What can this prove?" ”

Qin Enze smiled bitterly: "Why can't you figure it out? The falling velocity of their entire system is combined to form a range of 4-8. However, the weight of cotton is 4 and the weight of iron is 8. If it is affected by weight, then their falling speed should be 4+8=12.Their speed should be above 12. And not between 4 and 8. It's a paradox. ”

"This ......"

Lin Xiufeng's expression became weird, and his face was full of ghosts. The whole person fell into a daze, and kept muttering:

"This ...... How is this possible? Yes, if the velocity of a free-fall object is determined by weight, then their velocity should be the sum of the two weights, and the velocity should be the sum of the two weights. Why is this the case...... How so. ”

He was stupid. The law of free fall, which has been used throughout the world and has been circulating for hundreds or thousands of years, has been overturned. The rate of decline of cotton and iron, was overturned......

You can't explain it all, and the answer is a self-contradiction.

Qin Enze said: "So the speed at which an object falls is not determined by weight. The speed of the free fall motion varies at a uniform speed. The speed at which an object falls is directly proportional to time, the distance it falls is proportional to the square of time, and the acceleration of an object falling has nothing to do with the weight of the object and also has nothing to do with the mass of the object. ”

Lin Xiufeng said with a sigh: "That...... That's what it has to do with it. ”

"Gravity. I said gravity, free fall only changes under the influence of gravity. That's why I say that the speed of a free fall can only be determined by gravity, or by geography. The free fall speed of objects at different heights is not the same. ”

Lin Xiufeng's whole person was like being struck by lightning, and he was stunned on the spot.

He's still thinking about that question now, why?

It's really weird......

If it was a direct experiment, Lin Xiufeng might not approve it. But Qin Enze's example illustrates that an extremely terrifying contradictory assumption directly drove Lin Xiufeng crazy.

Why?

Li Zhen sat down and watched, sighing silently in his heart. The teachers sent by the imperial court are really a little disappointing.

Do you want them to teach, if you let them teach again, they won't be the seeds they want. Rather, it is just another mass production of 'paleoscientists'.

Li Zhen hesitated.

Lin Xiufeng was also strange, after sobering up from the contradiction of that kind of thinking, he was not angry, and asked Qin Enze again: "I have another question that has bothered me for a long time, I don't know if you can give an explanation." ”

"You say?"

Lin Xiufeng looked at Qin Enze with some expectation: "Why is the quartz clock out of power, or when the clockwork has no power and stops." The seconds hand always stops at nine o'clock. ”

Qin Enze was stunned, and looked at Lin Xiufeng suspiciously, who knows why his brain hole is so big. Such a tough one can jump away from the previous topic of free fall. Awesome.

"I haven't looked into this question. Brother Jinghong answered. ”

Liu Jinghong stood up and looked at Lin Xiufeng with disdain: "This question is actually very simple, and it is also a daily phenomenon in life, but I am afraid it is an unsolved mystery for you." Why does the second hand always stay at nine o'clock when the quartz clock is out of power, or when the clockwork is running out? Because the position of 9 on the clock is most affected by the gravitational moment resistance. ”

Lin Xiufeng looked at Liu Jinghong in amazement, never expecting that he would be able to explain this phenomenon to himself.

This phenomenon was discovered by Lin Xiufeng decades ago when he was still young. At that time, quartz clocks were popular, and he found that every time the quartz clock stopped, the second hand pointed to 9. No matter how many trials you try, this is the outcome.

This question has been bothering him for decades, and he has been unable to figure it out, trying to understand it, but he can't understand it at all. I also consulted many university scholars, but there was no reasonable explanation......

Some say because of metaphysics.

Some people say that because the number 9 is very unique, 9 represents the extreme of the number, so the pointer will always point to the extreme of the number.

It is also said that it is affected by the relationship of magnetic fields.

But Lin Xiufeng knew that these answers were not correct!

Unexpectedly, this short-tempered Liu Jinghong explained this phenomenon in one bite.

Lin Xiufeng looked at Liu Jinghong with some excitement: "What is gravitational moment?" ”