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Atwood's machine

noun Physics.
  1. a device consisting of two unequal masses connected by a string passed over a pulley, used to illustrate the laws of motion.
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Origin of Atwood's machine

named after George Atwood (1746–1807), English mathematician who invented it
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018