“To every action there is always opposed an equal reaction”

— Isaac Newton , book Philosophiae Naturalis Principia Mathematica

Laws of Motion, III
Philosophiae Naturalis Principia Mathematica (1687)
Context: To every action there is always opposed an equal reaction; or, the mutual actions of two bodies upon each other are always equal, and directed to contrary parts.

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Isaac Newton 171

British physicist and mathematician and founder of modern c… 1643–1727

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“To every action there is always opposed an equal reaction; or, the mutual actions of two bodies upon each other are always equal, and directed to contrary parts.”

Isaac Newton book Philosophiae Naturalis Principia Mathematica

Laws of Motion, III
Philosophiæ Naturalis Principia Mathematica (1687)

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