Newton's Laws are generally correct for day-to-day observations, although I think when you get into [[Relativity]] and [[The Standard Model (Quantum Mechanics)|quantum stuff]] that they are *not* right. Newton's Laws are in a field of physics called "Classical Mechanics". # The Laws > [!tldr] Super short > 1. Inertia is a thing > 2. F=MA > 3. Action = -reaction ### 1. Objects in motion stay in motion, objects at rest stay at rest ### 2. Force equals mass times acceleration ### 3. For every action, there's an equal and opposite reaction (within the system) ## Actual Laws From the source linked below. 1. _Corpus omne perseverare in statu suo quiescendi vel movendi uniformiter in directum, nisi quatenus a viribus impressis cogitur statum illum mutare._ Every object perseveres in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed thereon 2. _Mutationem motus proportionalem esse vi motrici impressæ, & fieri secundum lineam rectam qua vis illa imprimitur._ The change of motion of an object is proportional to the force impressed; and is made in the direction of the straight line in which the force is impressed. 3. _Actioni contrariam semper & æqualem esse reactionem: sive corporum duorum actiones in se mutuo semper esse æquales & in partes contrarias dirigi._ 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 **** # More ## Source - school - https://en.wikipedia.org/wiki/Newton%27s_laws_of_motion