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noninertial frame

noun Physics.
  1. a frame of reference that moves with the object, so that the moving object appears to violate Newton's laws of motion since it accelerates despite having no horizontal forces on it.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

non-inertial frame in Science

non-inertial frame

  1. A reference frame in which the observers are undergoing some accelerating force, such as gravity or a mechanical acceleration. Also called non-inertial frame of reference non-inertial reference frame, non-inertial system Compare inertial frame. See also inertial force Special Relativity.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.