Karate strikes
作者:
Jearl D. Walker,
期刊:
American Journal of Physics
(AIP Available online 1975)
卷期:
Volume 43,
issue 10
页码: 845-849
ISSN:0002-9505
年代: 1975
DOI:10.1119/1.9966
出版商: American Association of Physics Teachers
数据来源: AIP
摘要:
Analysis of a forward karate punch is made as an example of collision mechanics. The energy lost to deformation of an opponent is evaluated, and the deformation is shown to be maximized if contact is made when the fist has the greatest speed. In karate fighting the maximum deformation is obtained by focusing a punch to terminate several centimeters inside an opponent’s body. The average impact force is calculated and compared with that neeeded to break a human bone by stressing it beyond its ultimate bending stress value. Similar breaking forces needed for bricks and wooden boards are also computed. A brief description of breaking demonstrations for the physics classroom is made.
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