查看“牛顿运动定律”的源代码

'''牛顿运动定律'''是经典力学的三条基础定律，由'''[[牛顿]]'''在于1687年7月5日发表的巨著'''《[[自然哲学的数学原理]]》'''里提出。

==通常的现代表述==

*第一定律：假若施加于某物体的外力为零，则该物体的运动速度不变（也称'''惯性定律'''）。
*第二定律：施加于物体的外力等于此物体的质量与加速度的乘积（也称'''加速度定律'''）。
*第三定律：当两个物体相互作用于对方时，彼此施加于对方的力，其大小相等、方向相反（也称'''作用力与反作用力定律'''）。

==文言版==

*律一曰：[[天演論#嚴復自序|靜者不自動，動者不自止；動路必直，速率必均。]]
*律二曰：質量加速度積與物力相侔。
*律三曰：施力必受反，值等而向反。

==拉丁语原文==

*{{lang|la|Lex. I. Corpus omne perseverare in statu suo quiescendi vel movendi uniformiter in directum, nisi quatenus a viribus impressis cogitur statum illum mutare.}}
*{{lang|la|Lex. II. Mutationem motus proportionalem esse vi motrici impressæ, & ﬁeri secundum lineam rectam qua vis illa imprimitur.}}
*{{lang|la|Lex. III. Actioni contrariam semper & æqualem esse reactionem: sive corporum duorum actiones in se mutuo semper esse æquales & in partes contrarias dirigi.}}

==英文译文==

*{{lang|en|LAW I. Every body 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.}}
*{{lang|en|LAW II. The alteration of motion is ever proportional to the motive force impressed; and is made in the direction of the right line in which that force is impressed.}}
*{{lang|en|LAW III. 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.}}