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Newton's Three Laws of Motion Newton's First Law of Motion:I. Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it. Newton's Second Law of Motion:II. The relationship between an object's mass m, its acceleration a, and the applied force F is F = ma. Acceleration and force are vectors (as indicated by their symbols being displayed in slant bold font); in this law the direction of the force vector is the same as the direction of the acceleration vector. Newton's Third Law of Motion:III. For every action there is an equal and opposite reaction.
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