Classical Mechanics

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Classical mechanics

The science dealing with the description of the positions of objects in space under the action of forces as a function of time. Some of the laws of mechanics were recognized at least as early as the time of Archimedes (287–212 b.c. ). In 1638, Galileo stated some of the fundamental concepts of mechanics, and in 1687, Isaac Newton published his Principia, which presents the basic laws of motion, the law of gravitation, the theory of tides, and the theory of the solar system. This monumental work and the writings of J. D'Alembert, J. L. Lagrange, P. S. Laplace, and others in the eighteenth century are recognized as classic works in the field of mechanics. Jointly they serve as the base of the broad field of study known as classical mechanics, or Newtonian mechanics. This field does not encompass the more recent developments in mechanics, such as statistical, relativistic, or quantum mechanics.

In the broad sense, classical mechanics includes the study of motions of gases, liquids, and solids, but more commonly it is taken to refer only to solids. In the restricted reference to solids, classical mechanics is subdivided into statics, kinematics, and dynamics. Statics considers the action of forces that produce equilibrium or rest; kinematics deals with the description of motion without concern for the causes of motion; and dynamics involves the study of the motions of bodies under the actions of forces upon them. For some of the more important areas of classical mechanics See Ballistics, Collision (physics), Dynamics, Energy, Force, Gravitation, Kinematics, Lagrange's equations, Mass, Motion, Rigid-body dynamics, Statics, Work

McGraw-Hill Concise Encyclopedia of Physics. © 2002 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Classical Mechanics


mechanics based on Newton’s laws of mechanics, dealing with the motion of macroscopic material bodies at speeds that are low in comparison with the velocity of light. The motion of particles at speeds of the order of the velocity of light is studied in the theory of relativity, and motion of microscopic particles is studied in quantum mechanics.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

classical mechanics

[′klas·ə·kəl mə′kan·iks]
Mechanics based on Newton's laws of motion.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The authors of [35, 36] said that, in classical mechanics or in quantum mechanics, the position and momentum are independent dynamical variables or operator.
* Developed in relation to the solution of boundary value problems of classical mechanics, thermal physics, mathematical physics, electrodynamics, radio physics and magnetohydrodynamics new mathematical method for constructing complete systems of basis (coordinate) functions for geometric objects of arbitrary configuration with boundary conditions of various types and an arbitrary functional form of the recording, use the original special R-function (Rvachev functions) (1960th years);
Radium, 1959, 20 (1), pp.43-50 [To what extent can the classical mechanics predict trajectories?] jphysrad 1959 20 1 43 0.pdf
In other words, Gibbs' statistical mechanics permitted him to derive the first and second laws of thermodynamics from the laws of classical mechanics, if a statistical approach was adopted.
Now we illustrate that, because there is one truth only, even within the scope of original classical mechanics, the contradiction could also appear between the law of conservation of energy and the law of conservation of momentum.
In the de Broglie-Bohm interpretation, the impacts on the screen are the real positions of the electron as in classical mechanics and the three postulates of the measurement of quantum mechanics can be trivially explained: the position is an eigenvalue of the position operator because the position variable is identical to its operator (X[PSI] = x[PSI]), the Born postulate is satisfied with the "equivariance" property, and the reduction of the wave packet is not necessary to explain the impacts.
But, Krajewski continues, it is easy to note that also the relation between the Albert Einstein's Special Theory of Relativity and Classical Mechanics is analogous to the one existing between Quantum Theory and Classical Mechanics; (11) ergo also Albert Einstein made use of this principle.
Also, he is the founder of classical mechanics. One can hardly summarize Newton's contribution to science in a short column.
Quantum mechanics departs from classical mechanics primarily at the quantum realm of atomic and subatomic length scales.
The second was established by Sir Isaac Newton during the 17th and 18th centuries and often is referred to as "classical mechanics." The third school came about as a result of Albert Einstein's work in relativity performed in the early 1900s; scientists and experimentalists confirmed his theories throughout the remainder of that century.
While this academic principle is the foundation of classical mechanics, it's also pretty on the mark when it comes to the more mundane.

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