Secrets of Greatness Karate
The main secret in the martial arts movement is the movement speed and accuracy of focus attacks (target). All the technique in Karate intended untukmenghasilkan speed and power efficient. Before starting the movement, karateka accustomed to take a deep breath, then released again as he cried aloud "HAI-yaaa" when releasing the attack. In physics, the cry was actually a way to release a very large force generated by the muscles of the diaphragm (the muscle that regulates the movement of the lungs) that contract very quickly. With a scream, which made the movement become more efficient, especially in doing blow.
Figure 1 Karateka Hitting the Target.
In Figure 1 a karateka is hitting the target is made of wood. When his hand hit the target timber, there is momentum transferred from the hand to the target. The magnitude of force experienced by the timber a result of this stroke is highly dependent on how much momentum is transferred and how long the transfer time. The greater the momentum transferred the greater the force experienced by the wood. And the less time transfer the greater the force it. Karateka in Figure 1 at first stood by fist facing up. Then he gave momentum to the hand by moving it forward. Momentum for more hands large, karateka agency helped push (push the body would be more effective if during this process fist rotates one hundred eighty degrees, so that now the fist facing down). Furthermore, this large momentum transferred in as little as possible. Transfer time for small as possible, after hitting the target, the karateka immediately withdrew his hand quickly. To obtain the effect of a bigger blow, the pressure exerted by the hand of the karateka must be greater. This is obtained by making the surface of the touch between the hands and targets as small as possible. In this section is suitable to hit the metacarpal bones (the bone between the fingers and wrist, figure 2).
Figure 2 Transfer Momentum is big.
A karateka is able to hit targets with about 150 joules of energy. If a karateka is hit with the palm of his hand (width about 150 cm square), then the energy that is felt by the target point is only 1 joule per centimeter squared (ie 150 joule/150 cm2). But if the karateka is using the side of his hand that the width is smaller (for example, with an area of 15 cm square), then the energy that is felt by the target point could reach 10 joules per square centimeter, this course will provide a much greater effect. That's why targeting accuracy (blow which concentrated on the surface area as small as possible) is very important in karate. Figure 3 shows the parts of the hands and feet are often used to attack targets because it can effectively transfer momentum to the goal and has a surface as small as possible.
Figure 3 Parts of the body are used to attack.
To break the block of wood, concrete, brick or block of ice, blow a karateka should be able to provide a greater pressure than the elastic limit (spasticity) that can be tolerated by these objects. Elastic limit of Figure 4. Breaking betontiap different objects. Concrete has the elastic limit (maximum crushing) 400 kg per centimeter square.
Figure 4 Breaking Concrete
This means that if the concrete was hit with a force equivalent weight of 400 kg, in an area of one square centimeter,the concrete will be broken. Elastic limit of human bones at 40 times the elastic limit of the concrete shaft that is more difficult to be broken (a broken during a collision is a concrete stem and not the leg or arm bone man who hit him). Additionally, human hands and feet is also equipped with various ligaments, tendons, muscles, and skin that can help dispersing forces acceptable to the whole body (style no longer be concentrated), which in turn can absorb the force of 2,000 times the acceptable maximum force concrete. Hands and feet become stronger karateka with increasing frequency due to the adaptation exercise with the formation of callus tissue (callus) that can absorb the force received and mendifusikan during a collision (the hands and feet do not feel sick at all though beam collides with a hard solid.) Hands and feet are not trained
very easily hurt because the skin surface was too smooth. With practice Bigersson serious Mikael (Sweden) entered Guinness Book with 21 breaking concrete blocks measuring 60 cm x 20 cm x 7 cm by using his hands within 1 minute ago in 2001 (ck.. ck ... so great .... .).
So, all the wonders of Karate was to be studied using the principles of physics. Movements can be increased variations using various strategies that borrow concepts and laws of physics. There is no trick or magic involved. The secret lies only in the combination of concentration and mental and physical preparedness as well as good knowledge of physics .
(Yohanes Surya).
