# laws of motion definition

• noun:
• three rules defined by Sir Isaac Newton: (1) everyone perseveres in its condition of rest or of going consistently in a straight range, except as far as it really is meant to transform that condition by external force. (2) Change of motion is proportional on impressed force, and takes place within the direction in which the force is impressed. (3) effect is always equal and opposite to activity, that is to say, the actions of two-bodies upon one another are often equal plus in contrary directions.

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