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Any object, when in equilibrium from any external force or force, always remains in a uniform linear motion or at rest until an external force acting on it compels it to change this state;

In the case of a certain acceleration and mass, the magnitude of the acceleration of the object is proportional to the force, inversely proportional to the mass of the object, and proportional to the reciprocal of the mass of the object. The direction of acceleration is the same as that of the applied force;

The action and reaction forces between the two interacting objects are always equal in magnitude and opposite in direction, acting on the same straight line.

Soon after the outbreak of the Industrial Revolution, Li Yan proposed the three laws of force, which solved the basic theoretical knowledge for the manufacture and application of machines.

Soon after, Li Yan added the three laws of force that he proposed:

Force is what changes the state of motion of an object;

The force causes the object to gain acceleration;

Force is the interaction between objects.

As for the specific mechanical equations, there are so many years that Li Yan has forgotten them, so he didn't provide them, and let the future people slowly summarize them.

A revolution cannot be done by one or two people, it must be driven by countless people.

For example, the textile machine pushed out by the imperial court.

The loom was originally only three to five times faster than hand-weaving.

But through the continuous improvement of folk masters, its production capacity has been increasing, and after only a few months, its production capacity has exceeded ten times that of handmade textiles.

Moreover, this industrial revolution broke out not just one or two points, but a full-scale explosion.

Coal mining, iron smelting, steel making, and even agriculture have been greatly improved.

But—

Then again, it is only the early stage of the outbreak of the industrial revolution, and Li Yan has to wait and see what kind of trend it can become in the end.

After igniting the industrial revolution, Li Yan obviously had much less energy on industrial R&D investment.

This is first of all because Li Yan's ability is almost so great, no matter how much, Li Yan can provide some suggestions on the direction of development, and the specifics have to rely on the general public.

Secondly, Li Yan's job is to be an emperor, not a scientific researcher, and it is impossible for him to focus too much energy on scientific research, which will put the cart before the horse, and then may bury his own rule.

Of course, Li Yan is still paying attention to what should be paid attention to.

After recovering his energy from industrial research and development, Li Yan put the energy originally invested in industrial research and development back to weapons research and development.

Actually-

Over the years, Dazhong's weapons research and development have never been interrupted.

For example, the steamship powered by the steam engine that Daichu has been developing has been developing, and after this kind of steamship is formed, one of its main uses is for war.

Like the Dazhong Conscienceless Cannon, after so many years of unofficial improvements, its rate of fire, range and accuracy have been greatly improved.

Like the Dazhong Thunder, after so many years of improvement, it is not much different from the grenades of the later anti-Japanese period.

At present, the biggest research achievement of Dazhong in terms of weapons is that Dazhong has developed a musket, to be precise, it should be a flintlock pistol.

The musket alone is actually nothing difficult to study, and it will not take so much time for Dazhong to develop.

In fact, a long, long time ago, Dazhong had already developed an arquebus.

Well...... It is not entirely accurate to say that it was developed by Dazhong.

Before Dazhong began to develop muskets, in this era, in fact, there were already the earliest muskets - many years ago, someone invented a simple bamboo tube, one end was sealed, loaded with gunpowder, left a small eye in the part containing gunpowder, the fuse was triggered, and after ignition, the enemy was burned with the open end.

But—

This earliest musket was not powerful enough to hurt people, and the bamboo pipe was particularly easy to explode, which could easily hurt oneself or one's own people.

Later, someone was injured by the burst bamboo tube, so it was found that the burst fragments were more lethal, so someone put a small iron ball in the front end of the gunpowder, which was the assault gun.

And the large medium musket was developed on the basis of the assault rifle.

The most out of the improvement is relatively easy.

With the guidance of Li Yan, a person with the vision of later generations, it only took a few months for the scientific researchers in Dazhong to develop a very mature arquebus.

It's just that this arquebus has too many drawbacks.

First of all, because it takes a section of arquebus to start the arquebus, so the gunner has to carry a fire rope up to several meters on his body, before the battle, the gunner must first light the fire rope before he can shoot, the trouble is to death, the key is that when the weather is wet, the fire rope is extremely difficult to ignite, and the fire rope is also very dangerous when it is lit, a little careless, the spark will ignite the cartridge belt on the body, causing an explosion that injures the gunner himself, and even hurts the gunman's accomplices, and the lit fire rope is easy to expose himself at night, It is impossible to sneak up on the enemy at night.

Secondly, the arquebus operation is extremely complicated - it is difficult for a trained gunner to fire more than two shots in a minute, and with this time, a trained and fast archer can shoot more than ten or twenty arrows, and even the rate of fire of a crossbow is much faster than that of this arquebus.

Thirdly, the arquebus was completely unusable in the rain - not only in the rain, but also in the wind, because the wind would blow away the powder on the fire door, and because of the pyrotechnic powder used, it would be like a smoke grenade to blind your own troops.

Finally, the biggest disadvantage of this arquebus is that it has a short range, especially the effective range, which is very close, and it is far from being comparable to a bow and crossbow.

This is also the reason why although Dazhong has long developed muskets, they have not been equipped with the army.

After Li Yan saw the arquebus developed by the scientific researchers, he provided the scientific researchers with two main research directions - ballistics and ignition.

In other words, Li Yan asked the researchers to increase the rate of fire and accuracy of the musket.

And the goal in Li Yan's heart is this flintlock pistol.

Compared with the arquebus, this flintlock pistol can be said to greatly simplify the shooting process, and improve the firing rate and shooting accuracy, and is easy to use.

Only such a flame spear can replace the bow and crossbow and become the standard weapon of the army.

The point is that flintlock pistols are less expensive and also facilitate mass production.

In the last Europe, after the flintlock pistol was developed, it took a full 200 years to be equipped before it was eliminated.

After nearly a decade of research, the Dazhong flintlock pistol is finally very mature and can finally equip the troops.

But—

Li Yan did not immediately redress all the troops.

First of all, at this stage, it is simply impossible to build so many flintlock pistols, and it is impossible to reequip all the troops.

Second, weapons alone do not work without tactics -- Dazhong's current tactics have been summed up by the concerted efforts of countless military personnel after many years of actual conditions, and all the officers and men have adapted to this tactics.

Again, Li Yan was ready to use this flintlock pistol as a secret weapon, ready to use it at a critical moment, and then use it to sweep the world.

In the end, Li Yan only equipped two troops with flintlock pistols - that is, Li Yan's pro-army Liberation Army and Tabai Army.

At the same time, Li Yan sent Yue Fei, Liu Qi, Wu Jue, Han Shizhong, Zhang Xian, Wang Yan, Wu Lan and other generals 1,000 flintlock pistols each, as well as his own understanding of the musket and the use of the musket on the battlefield, so that Yue Fei and others could explore the tactics after the musket was added to the battlefield in actual combat.

……