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

Its survivability stats, printed around the lens, include waterproof to 14 meters (46 feet), shockproof to 2-meter (6.5-foot) drops, crush-proof to 100 kilograms (220 pounds) of force and cold-proof to -10 degrees Celsius (14 degrees Fahrenheit).

ENGADGET