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| − | *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(惯性定律) | + | '''牛顿运动定律'''是经典力学的基础定律。 |
| − | *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 | + | |
| − | *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(作用力与反作用力) | + | ==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''' ) 。 |
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| | + | ==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:凡力必逆向等值而反。 |
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| | + | ==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.}} |
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| | + | ==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.}} |