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Full Idea
Law 3: To any action there is always an opposite and equal reaction; in other words, the action of two bodies upon each other are always equal and always opposite in direction.
Gist of Idea
3: All actions of bodies have an equal and opposite reaction
Source
Isaac Newton (Principia Mathematica [1687], Axioms)
Book Ref
Newton,Isaac: 'Philosophical Writings' [CUP 2004], p.71
A Reaction
Is this still true if one body is dented by the impact and the other one isn't? What counts as a 'body'?
Related Idea
Idea 24064 If something is pushed, it pushes back [Aristotle]
| 24064 | If something is pushed, it pushes back [Aristotle] |
| 19673 | Galileo mathematised movement, and revealed its invariable component - acceleration [Galileo, by Meillassoux] |
| 20964 | Descartes said there was conservation of 'quantity of motion' [Descartes, by Papineau] |
| 20968 | Newton's Third Law implies the conservation of momentum [Newton, by Papineau] |
| 15958 | Inertia rejects the Aristotelian idea of things having natural states, to which they return [Newton, by Alexander,P] |
| 17017 | 1: Bodies rest, or move in straight lines, unless acted on by forces [Newton] |
| 17019 | 3: All actions of bodies have an equal and opposite reaction [Newton] |
| 17018 | 2: Change of motion is proportional to the force [Newton] |
| 22173 | Galileo refuted the Aristotelian theory that heavier objects fall faster [Okasha] |
| 22618 | In modern physics the first and second laws of motion (unlike the third) fail at extremes [Ingthorsson] |