Munson, Bruce R. Department of Aerospace Engineering and Mechanics, Iowa State University, Ames, Iowa.
Last reviewed:August 2017
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The principle that there is an upward fluid force on a body submerged or floating in a stationary fluid that is equal to the weight of the fluid displaced by the body. The concept of Archimedes' principle (Fig. 1), perhaps the oldest stated principle in fluid mechanics, was first put forth by Archimedes in the third century BC. Archimedes was a Greek mathematician and physicist, and he is credited with discovering that a buoyant force on an object is equal to the weight of the fluid displaced by the object. See also: Buoyancy; Fluid mechanics; Fluids; Force
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