Definition of Impact force
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Impact force Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
[File:Concussion Anatomy.png|thumb|right|Head impact can cause concussion. Sports helmets help protect against brain injury. ]] In mechanics, an impact is a high force or shock applied over a short time period when two or more bodies collide. Such a force or acceleration usually has a greater effect than a lower force applied over a proportionally longer period. The effect depends critically on the relative velocity of the bodies to one another.
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