After Li Mengxi finished speaking, Liu Bei and Guan Yu frowned.

Li Mengxi's explanation of relative speed is novel and refreshing, and you can understand the truth as soon as you hear it.

Liu Bei pondered for a long time, "The same direction is like the same speed, and the opposite is like silence. Well, according to this principle, if I gallop on my horse and an arrow shoots from the side, the speed of the arrow is equal to the speed of my horse. At this time, someone grabs it, wouldn't it?

Catch it like it’s still? Just grab it and start it?”

Li Mengxi smiled, Liu Bei's understanding was quite good, "Of course!" Li Mengxi clapped his hands and praised.

Liu Bei's thoughts were wide open, his eyes moved, and he suddenly said, "When the soldiers are attacking, if the second brother's Qinglong sword is slashed, I want to block his sword, lift it with the sword, and move the sword towards the second brother. If at this time,

, I don’t need to lift, the sword is moving toward me." As he said this, Liu Bei stretched out his fingers to make a gesture like a pair of swords, "The second brother's sword came, I followed it and slashed diagonally towards me, half slashed, half swung, and deflected the other sword.

Isn’t it easy to gain momentum?”

Liu Bei had a slightly excited look on his face, as if a martial arts master had mastered the unparalleled martial arts.

And Li Mengxi was a little confused. He didn't understand fencing skills either, or how to tease or chop.

After a long while, Li Mengxi vaguely understood what Liu Bei meant.

It's like this. The duel between the Azure Dragon Sword and the Double-pronged Sword is a mess of cutting, slashing, and smashing, and is quite complicated.

Simplify it and simplify it into two arrows.

If two arrows move in the same direction, will they easily change the direction of each other, or will they move in opposite directions?

The answer is, in the same direction.

Relative motion, after the collision, the kinetic energies cancel each other out, and both arrows hit the ground.

When moving in the same direction, an arrow is flying in front, and another arrow is fired from behind. If the shaft of the arrow in front is slightly touched at an angle, the direction of the arrow in front will be greatly changed, and it will deflect to one side.

Arrows and arrows are like this.

What Liu Bei said was that he wanted to use his sword to block the blow of Guan Yu's Qinglong Sword. The weight of Liu Bei's single sword and Yanyue Sword were not at the same level at all. Therefore, he used the sword to move towards Guan Yu and offset each other with a head-on collision method.

Kinetic energy doesn't work.

But he reversed the attack direction of the sword, and Liu Bei slashed the sword towards him. During the slashing process, he moved slightly to the side, which deflected the Qinglong Sword's attack.

That is to say, instead of using kinetic energy to hit hard, the sword's kinetic energy and the kinetic energy of the Qinglong Sword are not wasted, and the sword follows the force of Guan Yu's sword and gently picks it up...

This technique makes Li Mengxi feel a bit like using force to fight, and it also seems to involve the decomposition of force.

Liu Bei was so anxious that he couldn't help but drag Guan Yu into a contest, wanting to see how the [Sword Drawing] technique worked.

Li Mengxi also wanted to watch the fight, so he took his younger brother to watch together.

In one corner of the training ground, Guan Yu brought up the Green Dragon Sword, and Liu Bei held a double-stranded sword in the shape of a cross in front of him.

Liu Bei called Guan Yu and asked Guan Yu to chop him down.

Guan Yu turned the handle of the knife, turned the back of the knife downwards, and the blade upward. He took the Qinglong Dao and slashed vertically at Liu Bei.

Liu Bei followed the trend and moved with a strange posture. The two swords in Liu Bei's hands did not hit Guan Yu's sword. Instead, they followed the direction of Guan Yu's sword and struck down vertically. Guan Yu's sword was heavy, but Liu Bei's sword was light after all. He struck first and struck first.

It can catch up with the Qinglong Sword blade.

When the swords clashed, Liu Bei raised and swung his swords to the right, knocking the Qinglong Dao aside. The Qinglong Dao hit the ground one step to the right of Liu Bei with a clang.

Li Mengxi understood clearly that Liu Bei was hitting Guan Yu in the vertical direction of his strength.

The decomposition theorem of force states that two forces in perpendicular directions will not cancel each other out. That is, a force acting vertically on another force can change the direction of the other force to the greatest extent.

Being able to change the direction of the force to the greatest extent means that most of the kinetic energy is used to push away the opponent's weapons, which can push the opponent's weapons away to the maximum distance.

Li Mengxi couldn't remember whether the decomposition of force was a content in junior high school physics or high school physics. Anyway, it was a vertical force, and there was no offset between the two phases.

The contest between Liu Bei and Guan Yu continues. The two men are very powerful, and their weapons are made of fine steel. Even though they did not use all their strength, the weapons collided with each other, making a clanging sound, and there were little sparks from the collision of the weapons.

Li Mengxi, who was watching the battle, suddenly said, "Xuan Degong, hit the tip of his knife!"

When Li Mengxi shouted, Liu Bei and Guan Yu stopped and looked at each other at the same time.

Liu Bei was stunned for a moment, "Why?" he asked in confusion.

That's right. When Li Mengxi saw Liu Bei always hitting the blade of Guan Yu's Qinglong Sword with his sword, he probably understood that Liu Bei wanted to try to swing the Qinglong Sword away.

Li Mengxi didn't know much about the art of military attack. He was only good at using his own knowledge to understand it. There was no doubt that when the Qinglong Dao and the double sword collided, the whole process was roughly a lever.

When the double-stranded sword hits the tip of the Qinglong Dao, the impact arm is longer, making it easier to deflect the Qinglong Dao's attack.

Liu Bei came over and asked. Li Mengxi briefly talked about leverage, and Liu Bei understood it as soon as he heard it.

This is not the first time Liu Bei heard about leverage. Leverage is like a scale.

Following Li Mengxi's advice, Liu Bei deliberately hit the tip of the Qinglong Dao with his sword and tried it, but it was inappropriate.

Because when the weapon collides, it will slide and hit the sword. If the weapon touches it even slightly, the sword will slide away.

Therefore, logic must be logic, and practice must be practice.

According to leverage analysis, hitting the blade head will more easily deflect the attack of the Azure Dragon Sword. However, in actual combat, the blade tip will open as soon as it is touched, making it impossible to continue wrestling.

Therefore, the blocking technique for soldier hits should not only consider accuracy, but also fault tolerance.

It is most appropriate to hit the middle part of the Qinglong Dao's blade with a double-stranded sword. If you hit the middle part of the blade, the double-stranded sword will still hold the blade and can still exert force.

However, since Li Mengxi kindly offered the so-called leverage, Liu Bei thought about it again and found that it was still useful.

It is useful when wrestling, the weapons are holding each other together, the Qinglong Sword wants to press down hard, and the double-stranded sword wants to lift up hard. At this time, the sword can be slowly moved to the tip of the Qinglong Sword.

The moment arm becomes longer little by little, and the wrestling force becomes more advantageous little by little, and you will be able to gain the upper hand in the wrestling.

Military training was a heavy matter, Liu Bei and Guan Yu competed for a while, then each collected their weapons and returned to the training ground.

Because Li Mengxi encountered another learning point, he went back to get some cloth, pen and ink, and came back again, and wrote,

"Siege ladders and all other siege equipment are pushed from a distance to the enemy's city. Someone pushing the equipment will be injured by arrows halfway. Therefore, there must be a "substitute method."

The siege ladder travels the fastest among all weapons, and it is the most difficult to replace the siege ladder. Therefore, the siege ladder should be replaced in a single row.

The substitution of the siege ladder is the same as the relay running. The key is that the substitute should be at the same speed as the siege ladder. Especially when cutting into the team from outside the team, the speed must be controlled and there should be no delay.

If the soldiers cannot cooperate perfectly, they would rather throw away the ladder and carry it again instead of using the substitution method.

Throwing the ladder to regroup the manpower only takes a moment. If the replacement of soldiers cannot be perfect, one person will be replaced and another person will be charged. The siege echelon will be confused for a moment, for one person it will be confused for another moment, and for ten people it will be confused for eleven moments, which greatly disrupts the speed of movement.

Therefore, when it comes to the substitution method for the siege ladder, the soldiers should be replaced if they can, but if they are not, there is no need to substitute."

Li Mengxi discovered a key point here, which was particularly critical as to whether the siege echelon could reach the city as quickly as possible.

Liu Bei and Guan Yu ordered the training to stop, and the two men came off the field. The key was to give guidance to each team and replace them.

The key is to run at the same speed as the siege ladder. More importantly, you must pay special attention to your speed when you enter the siege ladder.

After a period of time, the centurions were handed over, the drill continued, and the training ground became noisy again.

Li Mengxi looked intently again. When he saw the military training restarting, and when the siege echelon was replacing its manpower, he knew that he was deliberately running. Especially when he cut into the team, he knew that after knowing the intentional control, the collisions were much less.

Only a few military training items could be seen on the edge. Li Mengxi wanted to walk down to the training ground to take a look. Liu Bei and Guan Yu were afraid that there would be people walking around in the training ground and they would bump into him again, so they followed Li Mengxi and walked there.

We then went to the training ground where fighting techniques were practiced. There were more people here and there were no equipment.

There were dozens of sword and shield soldiers, practicing offense and defense. To Li Mengxi's surprise, carts were used for the training.

I don't know if it was Liu Bei or Guan Yu, but they pulled the grain carts over. The carts were connected end to end, forming two rows. The two rows of carts pretended to be city walls, the aisle in the middle pretended to be the city head, and the people blocking both ends pretended to be guards.

The soldiers of the city, the people who jumped over from the cart, pretended to be the soldiers attacking the city.

This chapter is not finished yet, please click on the next page to continue reading the exciting content! It can be seen that the key to training the city fighting skills is not the siege soldiers themselves, the key is to simulate the defenders.

Li Mengxi could tell at a glance that the defenders as sparring partners had many more people than the siege party.

The place where the two handlebars faced each other was used as a battlement. A man who looked like a veteran wearing armor and holding a stick in his hand ordered the next man to jump in.

The sword and shield soldiers guarding the outside of the car immediately jumped inside.

As soon as I jumped here, there were people inside holding long and short sticks, and they immediately came over with a pile of sticks.

The sword and shield soldiers who jumped in quickly put their shields in front of themselves.

How could a shield block enemies on all sides? In an instant, four or five long sticks struck or hit the sword and shield soldiers.

"Stop!!" The veteran looked furious and shouted to stop the drill.

The grumpy veteran came over, pressed the handlebar with one hand, and jumped in.

"Damn it!" He scolded someone before saying anything, "Let me tell you something!" The veteran looked around and said, "When you climb into the city, the shield in your hand is not for you to hold like a bastard. You climb into the city and circle around.

We are all human beings, and you can’t stop them even if you want to.

Remember this! When you get to the city, you will only have two mouths of spitting left to live! Hold the shield in your hand and push it forward, smash it forward, but you can't hold the shield without moving!

You just think, if you jump, you will jump into a pile of family members, and a dozen knives will shoot you, and you will not be able to stop them."

Having said this, the veteran paused deliberately.

"I guess some people are muttering that if you go to the city, you will die, so isn't your death in vain? No, it is not in vain! Ten of them will kill you with swords. No matter how many swords they have, if they hit you with one sword, you will also die with one sword.

Going to the city means death, but if we go to the city, he still thinks about it? If we die, does he still want to survive?

Just forget it, as long as you get to the top of the city, you only have two mouths of foam left to survive. If you hold on to the shield and don't move, you will survive two mouths of foam and be stabbed to death.
To be continued...