The greening of Guanshishan Academy is very good, and it is close to the Wei River, surrounded by mountains and rivers, and has a beautiful environment.

Although it was a hot summer day, it was only half past nine in the next generation, and standing on the roof, I didn't feel how hot it was.

Li Kuan looked at at the thousands of melon-eating people under the Gewu Building, and a smile appeared on his face that Xu Jingzong couldn't read at all.

"Again, keep your eyes open and see clearly!"

Seeing that Li Kuan picked up an iron ball in each hand and stretched it out of the railing, Xu Jingzong hurriedly yelled.

The seven-story building is not high at all, and it can even be said to be short, after all, it is just more than 20 meters.

Around the Gewu Building, a bunch of people stared at Li Kuan's hand with wide eyes, and some stared at the ground, just waiting to see which iron ball landed first.

"Bang!"

It was only a matter of a few seconds, and with Li Loose's hand, two iron balls, one large and one small, fell to the ground at the same time.

"You look at this iron ball, don't let people drop it, I think this iron ball may be weird."

Changsun Chong said to one of the guards beside him.

"One is a half-pound iron ball, and the other is a three-pound iron ball, why does it seem to land at exactly the same time?"

"Strange! Could it be that the landing time is too close and I can't see who comes first and who comes last? ”

"Could it be that this is what His Royal Highness the King of Chu said to subvert everyone's cognition?"

For a moment, there was silence on the ground.

However, soon, after the first person's question, there was a buzz of noise.

"Everyone's got to have doubts about the result, right?"

Li Kuan leaned on the guardrail with his upper body, raised his voice slightly, and said loudly: "Then next, this king will do two more sets of tests, and you have to see clearly." ”

"Bump!"

"Bump!"

The result did not change, and the two iron balls still landed at the same time.

"This king will change another piece of wood, and release it at the same time as this big iron ball, and everyone will see which one lands first."

Li Kuan simply didn't do anything, and let everyone completely give up the luck mentality.

"Bump!"

Many people on the ground have already stared at the place where the iron ball is about to land in advance, wanting to accurately confirm whether it really landed at the same time.

Outcome......

"Interesting, this result is interesting."

Li Yan also stood in the crowd, looking at the large and small iron balls scattered on the ground with bright eyes.

Although I still can't figure out why they landed at the same time, there must be something I don't understand.

The prince said that he wanted to subvert everyone's cognition, and it was so.

"Can you let me go up and give it a try?"

Du He couldn't help but shout when he saw that everyone seemed to be about to accept this result.

"Lord Wang, this kind of person obviously doesn't trust us, don't pay attention to him."

Xu Jingzong's face turned dark when he heard the voice below.

"It's okay if you don't trust it, so let him throw it away by himself. That's Duhe, right? It just so happens that many people in Chang'an City know that I don't deal with him, so it's best for him to do another experiment. ”

Li Kuan didn't think it was unacceptable for anyone to question the results of the experiment.

Today, I want to raise everyone's interest in Gewu Academy, and if there are more controversies and debates, maybe the repercussions will be greater.

Li Kuan's frank attitude made Du He frown.

Today, I'm in the mood to see a joke, and judging from the current situation, this joke doesn't seem to be visible.

"Du Langjun, there are large and small iron balls, wooden blocks and stones, you can take any of them."

Soon, a guard took Du He to the roof of the Gewu Building, although Xu Jingzong was not happy with Du He, but he also dutifully explained there.

Du He glanced at Xu Jingzong and Li Kuan, did not speak, bent down, and picked up various things on the floor one by one.

You don't seem to notice anything wrong, huh?

Although he was confused, Du He didn't say anything, and finally picked two iron balls, large and small, and came to the railing.

Standing on such a high building for the first time, Du He was a little unaccustomed, and his legs were trembling involuntarily, but he didn't want to lose face in front of Li Kuan, so he gritted his teeth, held the iron ball with both hands, and stretched out the railing.

"Bump!"

Although it was not clear whether the two iron balls had really landed at the same time, Duhe could only hear one sound of landing.

That's not what I wanted.

"Du Langjun, do you want to do another round of experiments?"

Xu Jingzong couldn't help but let out a mocking laugh.

"This is unreasonable, obviously when the leaves and fruits land at the same time, the fruits fall first, and I have never seen a leaf fall first."

Du He felt as if he had grasped the loophole in this experiment, and he couldn't help but breathe a sigh of relief.

"You can go down, and this king will give you a brief speech next, so that you can understand the meaning and principle behind today's experiment."

Li Kuancai had no interest in arguing with Du He on the rooftop, it was a waste of his time.

Seeing Xi Junmai staring at him with an unkind face, Du He didn't dare to say anything, and left the roof of the building under the care of the guards.

"Everyone has seen this little experiment that Benwang did just now, and they must be full of questions, right? Why are the two things obviously different in weight, but they actually hit the ground at the same time? Why is this result not quite consistent with what everyone thinks? ”

Without a horn, Li Kuan had to sacrifice his voice.

Fortunately, he stood tall, so that the people below could not hear anything.

"I don't know if you have ever thought about a question, why after this king releases the iron ball, it falls down, not up? Why do some feathers flutter in the air slowly and even higher and higher after being released from the hand? ”

Hearing what Li Kuan said, the people eating melons outside the academy basically looked like they were watching the excitement; However, the students in the Guanshishan Academy, especially the students of the Gewu Academy, fell into deep thought.

The question asked by the prince seems to be very simple, but he has never thought about why?

It's like why one plus one equals two.

I just take it for granted.

However, it was taken for granted that the big iron ball landed first than the small iron ball, but this is not the case.

This means that what is taken for granted is not necessarily correct.

In the king's view, the reason is actually very simple. That's because the earth has an attraction to objects, attracting them to the ground; The king called this attraction gravity, the power of weight. ”

Talking to so many people, you are talking too deeply, and it makes no sense.

Li Kuan today is just a purpose to attract people and raise everyone's curiosity, as long as this purpose is achieved, the future affairs will still be handed over to these students.

Of course, from time to time, Li Kuan will write some teaching materials to teach these students a lesson, but after all, he can't rely on himself for everything.