Kinetics (physics)


Kinetics (physics)

Kinetics in physics

In physics, kinetics used to be the branch of classical mechanics that was concerned with the relationship between the motion of bodies and its causes, namely forces and mass. [ [http://www.britannica.com/eb/topic-318197/kinetics Britannica Online Dictionary] ] cite book |title=Text-book of Mechanics |author=Louis Adolphe Martin |page=Section X, pp. 69ff |url=http://books.google.com/books?id=Pr43AAAAMAAJ&pg=PA67&dq=mechanics+kinetics&lr=&as_brr=0#PPA69,M1 |year=1907 |publisher=Wiley ] Since mid-20th century, "kinetics" no longer is used in physics text books. See Analytical dynamics for more details.

Relationship to kinematics

"Kinetics" must not be confused with "kinematics", the study of motion without consideration of the physical circumstances causing it.cite book |edition=Reprint of the Fourth Edition of 1936 with a forward by William McCrea |title=A Treatise on the Analytical Dynamics of Particles and Rigid Bodies |author=Edmund Taylor Whittaker |url=http://books.google.com/books?id=epH1hCB7N2MC&printsec=frontcover&dq=inauthor:%22E+T+Whittaker%22&lr=&as_brr=0&sig=SN7_oYmNYM4QRSgjULXBU5jeQrA&source=gbs_book_other_versions_r&cad=0_2#PPA1,M1
page=Chapter 1 |year=1988 |publisher=Cambridge University Press |isbn=0521358833
] The latter was considered another branch of dynamics by some,] and a branch of mechanics by others.cite book |title=An Elementary Treatise on Kinematics and Dynamics |author=James Gordon MacGregor |page=p. "v" |publisher=Macmillan |url= http://books.google.com/books?id=3yMQAAAAYAAJ&printsec=frontcover&dq=kinematics+dynamics&lr=&as_brr=0#PPR5,M1 |year=1887 ] In modern physics, whereas the term "kinetics" is no longer in active use, "kinematics" still is considered one of the two pillars of classical mechanics. (See this discussion.)

Specialized uses

Nonetheless, the term "kinetics" continues to be used in specialized studies related to physics, especially by scientists in the ex-Soviet Union states, and in physical chemistry.Citation
isbn = 0750626356, 9780750626354
last = Lifshitz
first = E. M.
author-link=Evgeny Lifshitz
first2 = L. P. | last2 = Pitaevskii | first3 = J. B. | last3= Sykes |first4 = R.N. | last4 = Franklin
title = Physical Kinetics
publisher=Butterworth-Heinemann
date = 1981
] [Cite book
isbn = 0444515828, 9780444515827
last = Alexeev
first = Boris V.
coauthors = Alexeev
title = Generalized Boltzmann Physical Kinetics
publisher=Elsevier
date = 2004
] [Cite book
isbn = 1567000444, 9781567000443
last = Gorelik
first = G. E.
coauthors = N. V. Pavlyukevish, V. V. Levdansky, V. G. Leitsina, G. I. Rudin
title = Physical Kinetics and Transfer Processes in Phase Transitions
publisher=Begell House
date = 1995
] [Cite book
isbn = 0883189534, 9780883189535
last = Krainov
first = Vladimir P.
coauthors = Kevin Hendzel
title = Qualitative Methods in Physical Kinetics and Hydrodynamics
publisher=Springer
date = 1992
] [Cite book
last = American Chemical Society
first = Division of Physical Chemistry
publisher = American Chemical Society
title = Evolution of Kinetics: A Centennial Symposium of the Division of Physical Chemistry, American Chemical Society
date = 1976
] In such uses, a qualifier is needed, for example: "physical kinetics", "crystal growth kinetics", and so on.

Kinetics in engineering

In engineering, kinetics is still employed in its original sense as a converse of "kinematics". For example, according to Rao "et al.":cite book |title=Engineering Mechanics: Statics and Dynamics |author=C. Lakshmana Rao, J. Lakshminarasimhan, Raju Sethuraman & Srinivasan M. Sivakumar |page=Chapter 7 |year=2003 |isbn=8120321898 |publisher=Prentice Hall of India|url=http://books.google.com/books?id=F7gaa1ShPKIC&pg=PA175&dq=mechanics+kinetics&lr=&as_brr=0&sig=UdGMJIIaWvnn_kQRr2o5lEy-tZI ]

See also

* Statics
* Applied mechanics

Notes and References


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Look at other dictionaries:

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