Inertia
Isaac Newton's first law of motion is inertia. Inertia holds that objects at rest remain at rest and objects moving at a constant velocity continue to move at that velocity unless they are act...
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Impetus
Aristotle distinguished between two sorts of motion: natural and unnatural. Natural motions were those induced by the elemental constituents of things to seek their natural places—the e...
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Inertia
Impetus