也即： (B-H)t=mv-mv0 ⑴
Chinese martial arts inch fresh lethal physics explanation
Please be patient reader, I promise to use as little as possible in physics terms, formulas. And using basic physics.
I am Chinese martial arts, heavy prime rate and short burst strength. It is based on physics.
Physics, measure kinetic energy, M is the mass, and velocity V power for exponential change places, the sensitivity and importance of particularly great.
Like a bullet, the quality can be said is extremely small, but fast, and therefore destruction is enormous.
But to measure the effect of hitting boxing, whether you just look at the kinetic energy on the line it? That is, as long as the quality of boxers (in general, not less than boxers boxing heavy weight) is large enough, the faster, the greater his lethal it?
Of course not, because it should relate to the concept impulse.
The ancient Chinese martial artists who have mastered this principle from practice, just as we know that before burning chemical formula, already know how to use fire.
So mind, shaped Italy, through the arm, and other various boxing, and even firearms, express' fresh 'forces' are different. Jin, from the force from 巠, 巠 original meaning water clock, cited as a path, clock management, so the strength of the original meaning, that hair cut, there is a path of force. And fresh sound with 'enter', exegesis to the sound of the word with its meaning not every phase away. Jin stressed that it is the power of the 'enter', 'penetration of'. Yaoyan Zhi, fresh sound of the word form and meaning, has expressed its strong mode of use, rules, opportunities and other factors.
Fist to extreme, the same thing, so all our various boxing boxing emphasize the amount of effect. The most obvious to the genus Bajiquan. Octupole collapse made fresh emphasis on essentials, shake, assault. Collapse, such as the potential of landslides; shake, shake shock such as mountain; assault for the usage of a sudden, the action altogether. Force penetration shoulder, elbow, fist, hips, knees, feet in the whole one, the force strength as instant collapse bow hair as a clap of thunder.
Other pass back, Xingyi and other martial arts, there is such a 'cold crisp bomb', 'bombs shake', 'body like archers like an arrow,' 'bar gun such as archery' and other phrases. Even the 'soft run into just' Tai Chi, also 'loose', 'fat power such as throw' language of. For example, issuing knife, after application of the initial force, namely as a momentum to which he served as its self-driving. Then the strength and depth of greater than you with the same force, the handle can cause hand combat effectiveness.
Muhammad Ali once metaphor 'punches to hit like a red-hot iron', is said to be short punches.
In fact, the above said are the impulse maximized.
In addition, Wing Chun Yi Yi "inch King" is known, reportedly because its founder was a woman, the power is limited, so the short bridge narrow horse, boxing output only. The so-called "inch King," that is a short burst of power. Simply put: short distances, short time, explosive power. Only in respect of their physical characteristics, the "King inch" rough when in mechanics "momentum."
Learning Judo and wrestling are known: when the composer fell to the ground itself should be shaped with rounded contact with the ground, while stunt jumping from high buildings, first homeopathic turned a somersault landing. To as a buffer. As another example, the same glass, not broken down on the carpet and fell broken masonry floor stand, not entirely because of different hardness, but delayed the effect that the former time, and makes the impulse effect increases. Wear gloves boxer sponge, the principle of action is the impulse to use, otherwise too much damage done boxers.
Therefore easy to learn: study unarmed combat damage on the enemy can use to change the momentum, which is impulse. Let us briefly review what momentum theorem:
Suppose mass M attack warrior, the initial velocity is (whether it is stationary or moving speed), at the opponent's punching power F blows, do uniformly accelerated linear motion. After t seconds, a speed of v, according to Newton's third law of motion and acceleration equation F = ma
A = (v-v0) / t
Ft = mv-mv0
Because the product of mass and momentum is momentum. Therefore, the upper formula is:
Ft = p-p0
The product of the force and effect of time is called the impulse force. So on top of that momentum theorem formula we learned in junior high school. Its meaning is: to change the object of considerable external force and momentum.
Positive momentum theorem applies to research melee unarmed combat this problem. We can attack boxer temporarily equivalent to momentum. Time is short because the attack force, and change over time, so we can only measure its average.
Suppose samurai warrior armor punching attack acetic successful hits, we examine lethal armor.
With armor for the study. A punching assumed initial speed, strength is B, for B's momentum, that is lethal to H, according to Newton's law of action and reaction, methyl subject to the same large reaction force, the opposite direction.
A study of the change in momentum: hand speed, hit the target after, in reaction velocity v, momentum is reduced to zero.
Consider only the forces in the horizontal direction, according to the above momentum theorem:, Ft = p-p0-row:
(-H + B) t = mv-mv0
That is: (B-H) t = mv-mv0 ⑴
Obviously because v is 0, so then transform it, the formula becomes:
H = B-m (0 -) / t
H = B + m / t ⑵
Since m * v0 / t obviously positive, so H must be greater than F.
Moreover, it is obvious, is proportional to the mass m H and boxers punching speed and action time t is inversely proportional. In other words: the size of the lethal, greater than the punch attack, and the greater quality boxer, punches faster, the role of the shorter time in the opponent's body, the greater lethality.
Let us explain a specific example:
Now suppose that A is known boxers punching strength F 500 Newton, attack time was t of 0.1 seconds, the quality of armor to 100 kg, the initial boxing speed of 6 m / s, now ask A lethal attack in the end how much?
We value substituted into equation (2):
(500-H) × 0.1 = 100 (0-6)
H = 500 + 6000 = 6500 (N)
Therefore, although A boxer punching power is 500 Newton, but in fact he's lethality is 6500 Newton. His punching power is 13 times. This is quite amazing.
It should also be noted that this calculated, but the average lethal. The average value greater than the maximum lethality.
This explains why Wing Chun Why emphasize "inch fresh." And Wing Chun martial arts master Bruce Lee, he punches too perfect interpretation of his philosophy attacks: simple, direct, crisp fast. With the fastest speed, the minimum duration of action, for maximum killing effect.
Attacks nunchaku as well. This simple weapon is far more threatening than its surface.
Because of this: a measure of unarmed combat lethality need to consider four factors:
(2) punching power
(4) duration of action
The first factor of quality: with different weight should be measured by the boxers that is the product of density and volume m = ρν.
The second factor: punching power, determined by the quality of the samurai, the body structure, muscle strength and so on.
The third factor speed thanks to an internal drive, exercise. The role of time, is completely conscious grasp by an attacker.
The fourth factor is the role of time.
Do not need to function H = B + mv0 / t were derivative and differential analysis, it is easy to see: H direct positive correlation with F. While m, change the sensitivity v0 almost the same, these two changes involve both the providers of t. The changes to the H t is quite sensitive. This course is taken by the t range itself (section) decision.
In addition, brief mention: inch punch shots should be led by the Italian body to the arm body to body strength quickly focus on one point, in the shortest time and shortest distance outbreak. In addition to hard training and strength-inch outside, no law can be obtained him. "Kung Fu" of semantics, and "time" are homonyms, which has pointed the way of martial arts: to invest time and duration of exercise.