South Korean Flag love the meaning behind it. I've also heard that the short and long lines along with representing the elements also represent the strong protecting the weak and the weak protecting the strong. Like the taegeuk, its all about BALANCE.
The Physics When the ancient martial arts masters were developing their sophisticated fighting techniques, they experimented with fundamental principles of physics. In any fight between two people, both fighters bring a certain amount of energy to the situation. The total amount of potential energy depends on the fighters' size, muscle strength and physical health. The object of karate is to use your body to channel this energy.