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[题目]一根由粗到细均匀变化的匀质圆木棒,从 O 处挂起恰能平衡(如图一)。问:若从此处断开,两段的质量有何关系?从中可以看:质心的位置决定于圆台上、下底半径和出高
[Topic] A uniform round wooden rod that varies from coarse to fine and evenly suspended from O (Figure 1). Q: If you disconnect from here, what is the relationship between the quality of the two segments? From this, it can be seen that the position of the center of mass is determined by the radius and height of the upper and lower bases of the circular table.