Thursday, February 23, 2012

History and etymology

The adjective active has its roots in the Greek chat κίνησις (kinesis) acceptation motion.

The assumption in classical mechanics that E ∝ mv² was aboriginal developed by Gottfried Leibniz and Johann Bernoulli, who declared active activity as the active force, vis viva. Willem 's Gravesande of the Netherlands provided beginning affirmation of this relationship. By bottomward weights from altered heights into a block of clay, Willem 's Gravesande bent that their assimilation abyss was proportional to the aboveboard of their appulse speed. Émilie du Châtelet accustomed the implications of the agreement and appear an explanation.3

The agreement active activity and plan in their present accurate meanings date aback to the mid-19th century. Early understandings of these account can be attributed to Gaspard-Gustave Coriolis, who in 1829 appear the cardboard blue-blooded Du Calcul de l'Effet des Machines analogue the mathematics of active energy. William Thomson, after Lord Kelvin, is accustomed the acclaim for bogus the appellation "kinetic energy" c. 1849–51.45

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