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simple pendulum[′sim·pəl ′pen·jə·ləm]
A device consisting of a small, massive body suspended by an inextensible object of negligible mass from a fixed horizontal axis about which the body and suspension are free to rotate.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
a point mass that as a result of the force of gravity oscillates along a circular arc in a vertical plane. A bob suspended on an inextensible string for all practical purposes can be considered to be a simple pendulum if the dimensions of the bob are very small compared with the length of the string and if the mass of the string is very small compared with the mass of the bob. (See.)
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.