F=d(mv)/dt by IUSR | Mar 19, 2006 | 补充两句 | 0 comments 从F=d(mv)/dt到F=ma,看似很微妙的变化,但足以让我认识到什么时候该折中,什么时候要还原到本意。 牛顿第二定律原本表达的是F=d(mv)/dt,宏观世界中质量可视为不变,所以有了F=m(dv/dt)=ma。有的人用牛顿第二定律写成F=ma的样子来抨击经典物理,却不知道牛顿早已考虑到质量的问题,至少没直接视为常量。 Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Δ
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