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Newton's first law

   Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson 0.12 sec.
Newton's first law [′nüt·ənz ′fərst ′lȯ]
(mechanics)
The law that a particle not subjected to external forces remains at rest or moves with constant speed in a straight line. Also known as first law of motion; Galileo's law of inertia.


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Whether Shaun is doing flips on his snowboard or catching big air on his skateboard, he relies on Newton's first law of motion for every trick.
He writes that a perfect example of Newton's first law of motion--which states that an object in motion stays in motion until met by an external force, and that the more massive the object, the more inclined it is to continue to move--is William "The Refrigerator" Perry, an occasional fullback for the Chicago Bears in the 1980s.
 
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