Suppose you're going to throw somebody bigger than you. You know that your center of gravity has to be low, but there's more than that. A large part due to the 'weight vector'.
First, the center of mass must be not centered, because if stable, the person will be not easily thrown. Second is the pivot point. Where are you taking them down? If the answer is the feet, than the pivot point is the feet, so the person will create a circle starting with his feet. Same with any other part of the body. Take a hip throw for example:
Here, the pivot point is your hip, as you pull with your arm to further dislocate his center of gravity. Part of this is also biology, because his impulses know that if he doesn't go with you, his arm/shoulder would either dislocate or snap. Compare that image to this improper hip throw.
In this picture, the uke's center of gravity is centered, so he cannot be easily thrown.
Thanks for reading
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http://www.fightingarts.com/reading/article.php?id=281_
Thanks for reading
For more information, go to:
http://www.fightingarts.com/reading/article.php?id=281_