simple pendulum

noun Physics.
a hypothetical apparatus consisting of a point mass suspended from a weightless, frictionless thread whose length is constant, the motion of the body about the string being periodic and, if the angle of deviation from the original equilibrium position is small, representing simple harmonic motion (distinguished from physical pendulum ). Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
The special cases of the simple pendulum and the conical pendulum are noted.
Describes how to construct a simple pendulum seismometer.
Both simple pendulum and spring-based gravimeters could make relative measurements reliably, quickly, and accurately.
The coupled ocean-atmosphere system is of course far more comp lex than a simple pendulum.
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