论文部分内容阅读
例1 如图1所示,光滑细杆水平固定,一个质量可忽略不计的轻质圆环 A 套在其上,另有一个质量为 m 的小球B通过一根长为 L 的细绳与圆
Example 1 As shown in Figure 1, a smooth thin rod is fixed horizontally, a lightweight ring A of negligible mass is placed on it, and a small ball B of mass m is passed through a thin cord of length L. round