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## Vis vivaIn the history of science, living force) is an obsolete scientific theory that served as an elementary and limited early formulation of the principle of conservation of energy. It can be thought of as a type of kinetic energy or of energy related to sensible motions.
## Additional recommended knowledgeProposed by Gottfried Leibniz over the period 1676-1689, the theory was controversial as it seemed to oppose the theory of conservation of momentum advocated by Sir Isaac Newton and René Descartes. The two theories are now understood to be complementary. The theory was eventually absorbed into the modern theory of energy though the term still survives in the context of celestial mechanics through the ## In detailAlthough ancient philosophers as far back as Thales of Miletus had inklings of the law of conservation of energy, it was the German Gottfried Wilhelm Leibniz during 1676-1689 who first attempted a mathematical formulation. Leibniz noticed that in many mechanical systems (of several masses, v) the quantity:
_{i}was conserved. He called this quantity the living force of the system. The principle represents an accurate statement of the approximate conservation of kinetic energy in many situations. However, many physicists were influenced by the prestige of Sir Isaac Newton in England and of René Descartes in France, both of whom had set great store by the conservation of momentum as a guiding principle. Thus the momentum:
was held by the rival camp to be the conserved Members of the academic establishment such as John Playfair were quick to point out that kinetic energy is clearly not conserved. This is obvious to a modern analysis based on the second law of thermodynamics but in the 18th and 19th centuries, the fate of the lost energy was still unknown. Gradually it came to be suspected that the heat inevitably generated by motion was another form of The recalibration of was largely the result of the work of Gaspard-Gustave Coriolis and Jean-Victor Poncelet over the period 1819-1839. The former called the quantity ## See also- Vis-viva equation
- Conservation of energy: Historical development
## References- George E. Smith, "The Vis Viva Dispute: A Controversy at the Dawn of Dynamics",
*Physics Today***59**(October 2006) Issue 10 pp 31-36. (see also erratum)
Categories: Obsolete scientific theories | Thermodynamics |

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Vis_viva". A list of authors is available in Wikipedia. |