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An object at rest stays at rest; An object in motion stays in motion UNTIL acted upon by an outside force. 


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Force = mass x acceleration 


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For every action there is an equal and opposite reaction. 


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A force between any two objects with mass. Gets weaker with distance. On earth, things are accelerated at a rate of 9.8 meters per second per second. 


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A force that opposes motion. Related to mass; roughness or smoothness of the surfaces in contact; surface area touching, etc. 


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The study of laws that govern objects in motion. Lots of fun math calculations involved! 


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A push or pull on an object. (see Newton's 2nd law) 


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a change in velocity over time. 

