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d'Alembert's principle

British  
/ dalɑ̃bɛr /

noun

  1. physics the principle that for a moving body the external forces are in equilibrium with the inertial forces; a generalization of Newton's third law of motion

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of d'Alembert's principle

C18: named after Jean Le Rond d'Alembert (1717–83), French mathematician, physicist, and rationalist philosopher

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.