Secrets of Judo by Jiichi Watanabe Lindy Avakian & Lindy Avakian
Author:Jiichi Watanabe,Lindy Avakian & Lindy Avakian
Language: eng
Format: epub
ISBN: 978-0-8048-1631-1
Publisher: Perseus Books, LLC
Coefficient of friction
Since the friction (tangential force) changes proportionally to the force pressing two surfaces together (normal force), the ratio between the two forces is always constant. This ratio is usually called the coefficient of friction. Let us find the force necessary to make a man weighing 75 kilograms slide on a mat. According to experiments, the μ, or coefficient of friction between the sole of the foot and the mat is 1. If we assume μ to be equal to 1, we have the following equation:
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