upiybyiyrn990y 发表于 2022-6-2 22:52:12

绳子的“死结”和“活结”

1、“死结”两侧的绳因结住而变成了两根独立的绳，两段绳子上的弹力不一定相等。

2、“活结”一般是由绳跨过滑轮或者绳上挂-光滑挂钩而形成的两段绳子上弹力的大小一定相等，合力的方向一定沿这两段绳子夹角的平分线。

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ue6t1yvxvjevlv 发表于 2022-6-2 22:52:31

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