"Little Lizi, your skin is itchy!"

But I heard the Lord God say angrily:

"You're going to get out of here now! Don't forget, you said yes! ”

At the beginning, because of the relationship between the new avatar of the main god, Li Yunfeng had a discussion with the main god, and finally Li Yunfeng agreed to the main god to complete a task without pits.

Saying this, it seems that the Lord God does have the right to ask Li Yunfeng to fulfill his promise immediately.

"Wait, Lord God!"

At this time, Da Yu'er on the side suddenly spoke:

"My family Yun Feng did promise you to complete a task without pits, but you also promised Yun Feng to give him a chance to be guided by a famous teacher for free!"

"It's good now, the opportunity for the famous teacher to guide has not been given, and he is going to be asked to do the task?"

Da Yu'er is Li Yunfeng's wife, so she naturally turned her elbow inward to help her husband speak, and even the clothes on her body were reserved:

"That is, that is, Lord God, what about your promise?"

"Cut!"

I only heard the main god mutter: "Little Lizi, I regret letting you know about Da Yu'er." ”

Li Yunfeng didn't care about this: "Lord God, you also heard it, what about your promise?" What about the guidance of famous teachers? I won't be ruined by you! ”

"I am an omnipotent landlord god, and I will never play tricks when I say what I say!"

There is no way, in front of mortals, the main god must still take care of face: "Say it to your famous teacher to know, there will be no less!" ”

As soon as the words fell, there was an extra door on the wall in the couple's room, and the main god continued: "Little Lizi, the famous teacher has prepared for you, go to the training room!" When you're done with class, give me the task! ”

Da Yu'er glanced at Li Yunfeng, who nodded, signaled his wife to rest assured, and then walked over, opened the door and entered the training room.

"Li Yunfeng, have you provoked the main god?"

As soon as he entered the door, a mature male voice came into Li Yunfeng's ears, and this time the famous teacher was a man.

Li Yunfeng saw that the famous teacher standing in front of him was about the same height as himself, all around 1.75 meters, like a human being, with two hands and two feet, wearing a silver-white strange robe that looked like silk but also like metal.

The famous teacher's face was naturally blurry and impossible to see, but he introduced himself very warmly:

"You can call me Starlight."

Li Yunfeng immediately said politely: "Hello Teacher Starlight. ”

"Let's get started"

Teacher Starlight asked, "I heard from the Lord God that because you have just gained the ability of gravity, you want a famous teacher to guide you in related skills. ”

Li Yunfeng nodded: "Yes." ”

"Okay."

I only heard Teacher Xingguang continue to ask: "So, Li Yunfeng, in your cognition, what is the ability related to gravity?" ”

Li Yunfeng immediately blurted out: "Like Sigma, you can polymerize at will." ”

As a famous teacher found by the main god, Starlight knew Li Yunfeng's experience, and immediately raised his right hand slightly, and a circular projection with a diameter of half a meter appeared in front of the two of them, which was playing the picture of Sigma using mass adsorption to condense the gravitational boulder, and then asked:

"Like that?"

"Yes, that's it!"

At the beginning, Sigma used this trick to catch Li Yunfeng off guard, which made Li Yunfeng extremely impressed.

Imagine, you think that the other party throws out a small stone that can be caught casually, but when you catch this small stone, you find that it weighs 10,000 tons and cannot catch it at all!

Isn't this taste very sour?

"Good!"

Teacher Starlight nodded immediately, and with a wave of his left hand, the surrounding environment changed instantly, from the interior of the training room to a vast desert!

Li Yunfeng was also surprised by the ability of the bigwig-level existence to change the environment at will, he knew that Teacher Xingguang must have a good intention in doing this, so he was waiting for the other party's next step.

Sure enough, Teacher Starlight said to Li Yunfeng: "This is a desert, there are enough materials for you to use." You use gravity, imitate Sigma's moves, and condense stones to hit me! ”

Practice is the best means to test the truth, and Li Yunfeng immediately began to use gravity to condense the sand and soil into stones.

Of course, for Li Yunfeng, who has just mastered gravity, condensing sand is not as simple as it seems.

The individual particles of sand are extremely small, and if you want to gather them into stones without leaking sand without leakage, you need quite precise control, and when condensing the first few times, even Li Yunfeng could directly see sand particles falling from the stones with the naked eye.

This kind of stone obviously lacks cohesion, let alone throwing it out, I'm afraid it will decompose itself in mid-air!

So Li Yunfeng gave up directly and re-condensed.

After trying more than ten times, finally, in the palm of Li Yunfeng's outstretched hand, a stone with a diameter of ten centimeters and composed of sand grains finally succeeded in condensing without leaking sand!

Li Yunfeng was a little excited, he glanced at Teacher Xingguang, and then looked at the stone in his hand, the excitement on his face disappeared instantly, and the stone was also thrown on the ground.

"No way!"

Li Yunfeng shook his head, dissolved the stone, and said, "This stone is useless? ”

Teacher Starlight: "Tell me why!" ”

Li Yunfeng then spoke:

"The stone I condensed is just a simple aggregation of sand grains, how heavy these sands are, this stone is heavy, and it is impossible to condense a high-density 10,000-ton boulder like Sigma."

However, Teacher Xingguang asked rhetorically: "So, Li Yunfeng, don't you have any gains?" ”

Li Yunfeng was stunned when he heard this, seemed to understand something, and replied:

"No, Mr. Starlight, because of the practice just now, my control over gravity has improved."

Teacher Starlight then asked:

"What else?"

"And?"

Li Yunfeng was stunned for a second, reacted, and replied: "My understanding of gravity has also improved!" ”

A smile appeared on Teacher Starlight's face: "Let's talk about it!" ”

I only heard Li Yunfeng say:

"In the beginning, when I was condensing the sand grains, I used the method of kneading mud balls, which is to apply force from the outside to gather the sand grains and form stones. But with this method, I can't guarantee that the force will be applied evenly everywhere on the surface of the stone, so there are always cracks that allow the sand to leak out. ”

"But then it occurred to me that gravity is supposed to draw everything together, so applying force from the outside is not the right use of gravity."

"So I changed my tactics."

"I made a gravitational singularity, and I used this singularity to attract sand particles from the inside out, and then I condensed a stone that didn't leak sand grains."

"But, it's still useless!"

"Because, what I do is just simply aggregate the sand grains together, and it does not change the density of the sand grains themselves, so if I want to condense a 10,000-ton boulder, then the volume of this stone must be very huge, and the consumption time will be longer."

"If it takes that long to condense a stone, it doesn't make sense in actual combat, because your opponent won't give you that much time at all."

Speaking of this, Li Yunfeng couldn't help but sigh and asked, "Starlight Teacher, Sigma, how did you manage to change the density?" ”

Teacher Xingguang smiled and said, "Li Yunfeng, didn't you already say the answer just now?" ”

"I just ......"

Suddenly, Li Yunfeng understood: "It's cognition, it's my cognition of gravity!" ”

Sigma is an astrophysicist, and before he went crazy, he had been studying gravity, while Li Yunfeng, his knowledge of physics was only in college......

In terms of the understanding of gravity, the two are not of the same order of magnitude at all.

At this point, Mr. Starlight finally announced the answer:

"Actually, Li Yunfeng, your idea of making a gravitational singularity is correct, but you have no idea how much force you should exert on the gravitational singularity, so you can't condense a high-density boulder like Sigma."

"That is to say, Li Yunfeng, because of the cognitive gap, it is impossible for you to learn Sigma's gravitational moves."

At this moment, Li Yunfeng was dumbfounded: "Then what should I do?"

"You're asking me what to do?"

As a result, Teacher Starlight smiled and said:

"Li Yunfeng, if the harlequin is here, she will definitely kill you! The real moves have to be realized by yourself! ”

As soon as these words came out, Li Yunfeng immediately looked at Teacher Xingguang with wide eyes and asked, "Teacher, do you also know Harlequin?" ”

"She should have told you that in the multiverse alone, there are only a few strong people who can fight her, and I am one of them."

Teacher Xingguang looked at Li Yunfeng in surprise and continued:

"What a good teacher should do is not to teach by hand, which will only erase the talent and personality of students!"

"So, Harlequin is a good teacher because she knows how to inspire and guide students, so that they can understand the moves on their own."

"And I'm the same, I won't teach you anything directly except the basics, I will only give you some tips and let you understand the moves yourself!"

"Next, Li Yunfeng, listen to me!"

When Li Yunfeng heard this, he immediately listened to it, for fear of missing half a word.

Seeing Li Yunfeng's serious appearance, Teacher Xingguang spoke:

"Li Yunfeng, I mentioned before that your perception of gravity is not the same as that of Sigma, so think about it, what is your understanding of gravity!"

My perception of gravity......

Li Yunfeng lowered his head and thought about it.

The so-called gravitational force, in the scientific definition, is the force of attraction between any two objects or two particles in relation to the product of their mass, and is the most universal force in nature.

Since there is a gravitational force in any matter, it is also known as gravitational force.

For example, the mass of the earth is large enough, so the gravitational force of the earth can firmly hold people to the ground, and this force of the earth is also called gravity.

So what about the gravitational ability that Li Yunfeng mastered?

Is it related to quality, as is the scientific definition?

After thinking about it, Li Yunfeng raised his right hand and activated the gravitational force to absorb the surrounding sand particles in the palm of his hand, and quickly condensed into a boulder with a diameter of three meters.

In terms of mass, Li Yunfeng weighs only about 80 kilograms, but the gravitational force he manipulated can easily condense a boulder weighing several tons, which is inconsistent with the conclusion of gravity and mass in the scientific definition.

This shows that what Li Yunfeng actually controls is actually gravity itself, not the mass associated with it!

"It turns out that what I control is the force itself!"

Li Yunfeng, who came to the above conclusion, continued to think along this line:

What is Force?

Force is the action of an object on an object, so the forces all come in pairs, i.e., the acting force and the reaction force.

Specific to the gravitational force mastered by Li Yunfeng, its reaction force is the repulsion force, since Li Yunfeng can control the gravitational force, then he must also be able to control the repulsion force, because the two appear in pairs!

Thinking of this, Li Yunfeng's gaze looked at the boulder in his palm, and then the repulsion was launched, and the boulder was like a disemboweled cannonball, which was launched into the sky.

Obviously, since it was the first time for Li Yunfeng to use repulsion, his control of strength was not fine, but Li Yunfeng's face had already revealed excitement.

Because, he is enlightened!

Li Yunfeng realized that his gravitational ability actually controls the force itself, and has nothing to do with quality, and further realized that he can also exert the reaction force of gravity!

On the side, Teacher Xingguang, who also saw this scene, also nodded with satisfaction.

Li Yunfeng has a good understanding, and he will never be complacent because of the achievements in front of him, he soon had a new idea!

Since gravity and repulsion are mutual forces and reaction forces, it means that these two forces have their own directions.

And the force that has the direction of action is......