Starting with the friction underwent, we discuss the regularity of the variety of the max swing angle, the simple way to work out the friction doing work and the equation of motion etc.
从分析其受的摩擦力出发，讨论了最大摆角变化的规律；计算摩擦力作功的简便方法；运动方程及振动经历的时间问题。
Starting with the friction underwent, we discuss the regularity of the variety of the max swing angle, the simple way to work out the friction doing work and the equation of motion etc.
从分析其受的摩擦力出发，讨论了最大摆角变化的规律；计算摩擦力作功的简便方法；运动方程及振动经历的时间问题。
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