Action and Reaction: For every action, there is an equal and opposite reaction.
"If Object A exerts a force of 50N on Object B, then Object B simultaneously exerts a force of -50N back on Object A."
This law describes the symmetry in nature: forces always exist in pairs. These are called action-reaction pairs. Crucially, they act on different objects, which is why they don't cancel each other out to prevent motion.
Fₐᵦ = -FᵦₐRelated Tools
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