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例1如图1,对于同一高度(足够高)的两个定滑轮A、B,用一根足够长的绳子跨过它们,并在两端分别挂有质量为m1和m2的物体W1和W2(m1≠m2),另在两
Example 1 As shown in Fig. 1, for two fixed pulleys A and B of the same height (high enough), a long enough rope is used to span them, and objects W1 and W2 of mass m1 and m2 are hung on both ends respectively. (m1≠m2), another in two