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Supposedly vs. Supposably

fictitious force

noun, Physics.
any force that is postulated to account for apparent deviations from Newton's laws of motion appearing in an accelerated reference system.
Also called pseudo force. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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pseudo force in Science
pseudo force
A physically apparent but nonexistent force felt by an observer in a noninertial frame (that is, a frame undergoing acceleration). Newton's laws of motion hold true within such a reference frame only if the existence of such a force is presumed. The centrifugal force is an example of a pseudo force.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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