The point of Newton is, two things in the Law of Inertia, which one may think is trivial.

牛顿的观点是,惯性定律分两部分,可能有人觉得这种分法无关紧要

耶鲁公开课 - 基础物理课程节选

A typical problem that you may have done in your first pass at Newton's law, someone tells you a force of 36 Newtons is acting on a mass of whatever, 4 kilograms; what's the acceleration?

在你们第一次接触牛顿定律时,可能见过这么一道典型题目,告诉你,一个 36 牛的力,作用在一个物体上,4 千克吧,问加速度是多少

耶鲁公开课 - 基础物理课程节选