second law of motion

1. It follows from the principle of relativity that Newton's second law of motion, although fundamental in classical mechanics, only has an approximate and by no means complete validity.
   由相对论原理可知，牛顿运动第二定律尽管是古典力学中的基本原理，但只是近似的，而绝不是完全正确的。
2. According to the Newton's second law of motion, the law of conservation of mass, and Bingham plastic flow equation of slurry, as well as under top cement pulsation, the mathematical models of one dimensional pressure pulse propagation downwards in the cement column was established.
   文中根据牛顿定律、质量守恒定律及水泥浆的宾汉塑性流变性，在顶部水泥脉冲振动作用下，建立了水泥浆中，一维压力传播的波动方程的数学模型。
3. Based on Newton's second law and impulse theorem, the forces applied on the transportation piping by the fluid in the piping while the fluid flows have been analyzed according to the law of motion of transportation piping and flowing condition of the fluid.
   根据深海采矿系统工作时其输送管道的运动规律和管道内流体的流动情况，采用牛顿第二定理和冲量定理对管中流体流动时对管道的作用力进行了分析。
4. This paper is aimed at vague ideas of relativistic mass. It contra st s the differential form of Newton ′ s second law considered relativistic effect with equation of the varied mass ′ s motion, in order to describe visually the va riation of relativistic mass.
   针对相对论质量上的模糊认识，考虑了相对论效应的牛顿第二定律的微分形式，结合并比较变质量物体的运动方程，形象地描述了相对论质量的改变。
5. The concept of space time in classical mechanics is equal to that in Newton's second law of motion in essence.
   经典力学的时空观本质是牛顿第二定律的时空观。
6. A Method of Verifying Newton ′ s Second Law of Motion
   验证牛顿第二定律的一种方法

noun

1. the rate of change of momentum is proportional to the imposed force and goes in the direction of the force

   Synonym:    Newton's second law of motionNewton's second law