The point: that a period of a pendulum is independent of the mass - the steel ball, plus one professor - hanging from it.
目的是证明：钟摆周期和质量无关—那个铁球的，以及挂在上面的那个物理教授的。
It is a pendulum which is 5.1 meters long, and there is a mass at the end of it which is 15 kilograms.
这是个，5。1米长的钟摆，在末端，有一个重物，重15公斤。
For the pendulum, center of mass is here.
对摆来说，重心在这里。
The center of mass will immediately produce a force that swings the aircraft back to its position directly below the fulcrum, just as a pendulum or keel would.
大规模的中心会立即产生波动的力量，飞机回到自己的立场正下方的支点，就像一个钟摆或龙骨会。
This paper studies a cone with leaking as a pendulum and the period of its sand leaking movement and gives out the period changing rule of the variable mass pendulum.
本文以一个载满沙子的圆锥表漏斗作为单摆，研究沙子漏出过程的运动周期，从而给出此时变质量单摆的周期变化规律。
An approach using the suspended mass pendulum to reduce the structural response to earthquake ground motion was discussed based on the ANSYS software.
基于ANSYS有限元软件讨论了高层建筑结构利用悬挂质量摆减震的原理及减震性能。
Based on the mass-period method, a measuring device named double spring inversion pendulum was designed, which could measure the center of mass and moment of inertia of an engine.
基于振动系统质量周期法，设计了一种测试发动机质量参数的双簧倒立摆试验台。
Based on the mass-period method, a measuring device named double spring inversion pendulum was designed, which could measure the center of mass and moment of inertia of an engine.
基于振动系统质量周期法，设计了一种测试发动机质量参数的双簧倒立摆试验台。
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