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| of or pertaining to the molecular force within a body or substance acting to unite its parts |
| the property of a system that diminishes when the system does work on any other system, by an amount equal to the work so done |
fictitious 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.
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