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In physics and engineering, kinetics is the branch of classical mechanics that is concerned with the relationship between the motion and its causes, specifically, forces and torques.^[1]^[2]^[3] Since the mid-20th century, the term "dynamics" (or "analytical dynamics") has largely superseded "kinetics" in physics textbooks,^[4] though the term is still used in engineering.

In plasma physics, kinetics refers to the study of continua in velocity space. This is usually in the context of non-thermal (non-Maxwellian) velocity distributions, or processes that perturb thermal distributions. These "kinetic plasmas" cannot be adequately described with fluid equations.

The term kinetics is also used to refer to chemical kinetics, particularly in chemical physics and physical chemistry.^[5]^[6]^[7]^[8]^[9] In such uses, a qualifier is often used or implied, for example: "physical kinetics", "crystal growth kinetics", and so on.

References

^ kinetics. Encyclopædia Britannica Online.
^ Louis Adolphe Martin (1907). Text-book of Mechanics. Wiley. p. Section X, pp. 69ff.
^ Kinetics must not be confused with kinematics, the study of motion without consideration of the physical circumstances causing it (see, e.g., Edmund Taylor Whittaker (1988). A Treatise on the Analytical Dynamics of Particles and Rigid Bodies (Reprint of the Fourth Edition of 1936 with a foreword by William McCrea ed.). Cambridge University Press. p. Chapter 1. ISBN 0-521-35883-3.), which is a separate branch of classical mechanics.
^ See this discussion.
^ Lifshitz, E. M.; Pitaevskii, L. P.; Sykes, J. B.; Franklin, R.N. (1981). Physical Kinetics. Butterworth-Heinemann. ISBN 0-7506-2635-6.
^ Alexeev, Boris V.; Alexeev (2004). Generalized Boltzmann Physical Kinetics. Elsevier. ISBN 0-444-51582-8.
^ Gorelik, G. E.; N. V. Pavlyukevish; V. V. Levdansky; V. G. Leitsina; G. I. Rudin (1995). Physical Kinetics and Transfer Processes in Phase Transitions. Begell House. ISBN 1-56700-044-4.
^ Krainov, Vladimir P.; Kevin Hendzel (1992). Qualitative Methods in Physical Kinetics and Hydrodynamics. Springer. ISBN 0-88318-953-4.
^ American Chemical Society, Division of Physical Chemistry (1976). Evolution of Kinetics: A Centennial Symposium of the Division of Physical Chemistry, American Chemical Society. American Chemical Society.

[1] tics. Encyclopædia Britannica Online.

[Martin-2] Louis Adolphe Martin (1907). Text-book of Mechanics. Wiley. p. Section X, pp. 69ff.

[3] Kinetics must not be confused with kinematics, the study of motion without consideration of the physical circumstances causing it (see, e.g., Edmund Taylor Whittaker (1988). A Treatise on the Analytical Dynamics of Particles and Rigid Bodies (Reprint of the Fourth Edition of 1936 with a foreword by William McCrea ed.). Cambridge University Press. p. Chapter 1. ISBN 0-521-35883-3.), which is a separate branch of classical mechanics.

[4] See this discussion.

[physical-5] Lifshitz, E. M.; Pitaevskii, L. P.; Sykes, J. B.; Franklin, R.N. (1981). Physical Kinetics. Butterworth-Heinemann. ISBN 0-7506-2635-6.

[6] Alexeev, Boris V.; Alexeev (2004). Generalized Boltzmann Physical Kinetics. Elsevier. ISBN 0-444-51582-8.

[7] Gorelik, G. E.; N. V. Pavlyukevish; V. V. Levdansky; V. G. Leitsina; G. I. Rudin (1995). Physical Kinetics and Transfer Processes in Phase Transitions. Begell House. ISBN 1-56700-044-4.

[8] Krainov, Vladimir P.; Kevin Hendzel (1992). Qualitative Methods in Physical Kinetics and Hydrodynamics. Springer. ISBN 0-88318-953-4.

[9] American Chemical Society, Division of Physical Chemistry (1976). Evolution of Kinetics: A Centennial Symposium of the Division of Physical Chemistry, American Chemical Society. American Chemical Society.

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@@ Line 1: / Line 1: @@
+{{short description|Subfield of physics}}
-{{Classical mechanics|cTopic=Branches}}{{see also|Analytical dynamics}}
+{{Distinguish|Kinematics}}
-In [[physics]] and [[engineering]], '''kinetics''' is a term for the branch of [[classical mechanics]] that is concerned with the relationship between the [[motion (physics)|motion]] of bodies and its causes, namely [[force]]s and [[torque]]s.<ref>[http://www.britannica.com/EBchecked/topic/318197/kinetics kinetics]. Encyclopedia Britannica Online</ref><ref name=Martin>{{cite book |title=Text-book of Mechanics |author=Louis Adolphe Martin |page=Section X, pp. 69ff |url=http://books.google.com/?id=Pr43AAAAMAAJ&pg=PA67|year=1907 |publisher=Wiley}}</ref><ref>''Kinetics'' must not be confused with ''[[kinematics]]'', the study of motion without consideration of the physical circumstances causing it (see, e.g., {{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/?id=epH1hCB7N2MC&printsec=frontcover
+{{see also|Analytical dynamics}}
-|page=Chapter 1 |year=1988 |publisher=Cambridge University Press |isbn=0-521-35883-3}}), which is a separate branch of classical mechanics.</ref>  Since the mid-20th century, the term "[[Analytical dynamics|dynamics]]" (or "analytical dynamics") has largely superseded "kinetics" in physics text books;<ref>See [[Analytical dynamics#Relationship to statics, kinetics, and kinematics|this discussion]].</ref> the term "kinetics" is still used in engineering.
+{{Use dmy dates|date=December 2015}}
+{{Classical mechanics|cTopic=Branches}}In [[physics]] and engineering, '''kinetics''' is the branch of [[classical mechanics]] that is concerned with the relationship between the motion and its causes, specifically, [[force]]s and [[torque]]s.<ref>[http://www.britannica.com/EBchecked/topic/318197/kinetics kinetics]. Encyclopædia Britannica Online.</ref><ref name=Martin>{{cite book |title=Text-book of Mechanics |author=Louis Adolphe Martin |page=Section X, pp. 69ff |url=https://books.google.com/books?id=Pr43AAAAMAAJ&pg=PA67|year=1907 |publisher=Wiley}}</ref><ref>''Kinetics'' must not be confused with ''[[kinematics]]'', the study of motion without consideration of the physical circumstances causing it (see, e.g., {{cite book |edition=Reprint of the Fourth Edition of 1936 with a foreword by William McCrea  |title=[[A Treatise on the Analytical Dynamics of Particles and Rigid Bodies]] |author=Edmund Taylor Whittaker|author-link=E. T. Whittaker |page=Chapter 1 |year=1988 |publisher=Cambridge University Press |isbn=0-521-35883-3}}), which is a separate branch of classical mechanics.</ref> Since the mid-20th century, the term "[[Analytical dynamics|dynamics]]" (or "analytical dynamics") has largely superseded "kinetics" in physics textbooks,<ref>See [[Analytical dynamics#Relationship to statics, kinetics, and kinematics|this discussion]].</ref> though the term is still used in engineering.
-In mechanics,  the Kinetics  is deduced from  [[Kinematics]] by the introduction  of the concept of mass.
-In [[Plasma (physics)|plasma physics]], kinetics refers to the study of [[Continuum mechanics|continua]] in [[velocity]] space.  This is usually in the context of non-thermal ([[Maxwell–Boltzmann distribution#Physical applications|non-Maxwellian]]) velocity distributions, or processes that [[Perturbation theory (quantum mechanics)|perturb]] thermal distributions. These plasmas cannot be adequately described with [[Magnetohydrodynamics|fluid equations]].  Such plasmas are termed [[Plasma (physics)#Kinetic model|kinetic plasmas]].
-{{Tone|section|date=December 2013}}
-== Biomechanics and Kinetics==
-One of the major components of Kinetics is analyzing ones [[Center of Pressure]]. Center of pressure (COP) is often tested using a force plate in a biomechanics lab. Many scientist don't always have access to these expensive and unique equipment. Force plates can be any from thousands to tens of thousands of dollars. Scientist and students today have turned to an alternative way, by using Nintendo [[Wii Balance Board]] system as a force plate. One study that is being conduct by graduate students at San Diego State University are looking at sway in athletes in a taped ankle compared to a braced ankle. The students expect their results to find that ankle bracing will reduce sway and decrease ankle instability and falls. [[Postural sway]] is the measurement of the time and distance a subject spends away from an ideal center of pressure.  Measurement of a subject’s center of pressure has been used as a method of quantifying postural stability.Investigators have theorized that if ankle injuries cause differentiation and functional instability, a subject’s postural sway should be altered.Bracing has been known to provide cutaneous afferent feedback in maintaining postural control.  The feedback follows the same neurological pathways in which the external ankle brace enhances the replication of the joint position.<ref> {Brynhildsen J, Pintsaar A, and Tropp H.  “Postural corrections after standardized	perturbations of single limb stance: effect of training and orthotic devices in	patients with ankle stability.”  British Journal of Sports Medicine.  1996; 30(2):151-155.} </ref> Although some may argue that braces have a negative impact on sport performance, the effectiveness of their mechanical stability make them of high priority and necessity.  Due to the high incidence of ankle injury, the control of stability and body sway remain of most importance in reduction of injury and better quality of life.
+In [[Plasma (physics)|plasma physics]], kinetics refers to the study of [[Continuum mechanics|continua]] in [[velocity]] space.  This is usually in the context of non-thermal ([[Maxwell–Boltzmann distribution#Physical applications|non-Maxwellian]]) velocity distributions, or processes that [[Perturbation theory (quantum mechanics)|perturb]] thermal distributions. These "[[Plasma (physics)#Kinetic model|kinetic plasmas]]" cannot be adequately described with [[Magnetohydrodynamics|fluid equations]].
 The term ''kinetics'' is also used to refer to [[chemical kinetics]], particularly in [[chemical physics]] and [[physical chemistry]].<ref name="physical">
 {{Cite book
 | isbn = 0-7506-2635-6
-| last = Lifshitz
+| last1 = Lifshitz
-| first = E. M.
+| first1 = E. M.
 | author-link=Evgeny Lifshitz
 | first2 = L. P. | last2 = Pitaevskii | first3 = J. B. | last3= Sykes |first4 = R.N. | last4 = Franklin
@@ Line 56: / Line 51: @@
 | title = Evolution of Kinetics: A Centennial Symposium of the Division of Physical Chemistry, American Chemical Society
 | year = 1976
+}}</ref> In such uses, a qualifier is often used or implied, for example: "physical kinetics", "crystal growth kinetics", and so on.
-}}</ref>
-In such uses, a qualifier is often used or implied, for example: "physical kinetics", "crystal growth kinetics", and so on.
 == References ==
-{{reflist}}
+{{Reflist}}
+{{Authority control}}
 {{DEFAULTSORT:Kinetics (Physics)}}
-[[Category:Kinetics|*]]
+[[Category:Kinetics (physics)| ]]