伽利略的题目:如图所示,试证明,质点从竖直平面内的圆环上的各

伽利略的题目:如图所示,试证明,质点从竖直平面内的圆环上的各个点沿弦的方向安装的斜面向滑到最低点D所用的时间都相等,都等于从最高点A自由下落到最低点D所用的时间,假设斜面与质点间无摩擦.

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