inertial force

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inertial force

physics

Also known as: effective force, fictitious force, pseudoforce, reversed effective force

Written and fact-checked by The Editors of Encyclopaedia Britannica

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Also called:: Fictitious Force

Related Topics:: Coriolis force; centrifugal force; Coriolis parameter; beta effect; Coriolis effect

inertial force, any force invoked by an observer to maintain the validity of Isaac Newton’s second law of motion in a reference frame that is rotating or otherwise accelerating at a constant rate. For specific inertial forces, see centrifugal force; Coriolis force; d’Alembert’s principle.