用重量可忽视的细线吊起一质量为m重锤，使其左右摆动，当摆角为 0度时，重锤所受合外力大小等于小球本身的重力。
单摆实验是用来测量当地重力加速度的。
Mono-pendulum experiment is used to measure local weight acceleration of gravity.
本文讨论了在单摆实验教学中，如何应用不确定度理论进行实验方案的设计和测量结果的分析。
How to design the experiment programs and analyze the measuring results in single pendulum experiment teaching based on the uncertainty theory is discussed in this paper.
在实验中就要测定单摆的摆长，然后测定此摆长时的振动周期。
So in experiment we should measure the length of single pendulum, then get the period of oscillation in this condition.
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