解题方法
1 . 如图所示,对于同一高度(足够高)的两个定滑轮
,用一条足够长的绳子跨过它们,并在两端分别挂有质量为
和
物体
,另在两滑轮中间的一段绳子的点O处悬挂质量为m的另一物体,已知
,且系统保持平衡(滑轮半径、绳子质量均忽略不计).求证:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/14c76b26-c146-4b24-b1d9-43a083b496a9.png?resizew=216)
(1)
为定值;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77ab1256702aef4e9f1a5eb6c12ecc96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fbd67f60f04c278bdd867fdb3979dfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a73575919aee3ad9168bb8a571ac2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8221dc72ac62f2032c2f4061970ac7bb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/14c76b26-c146-4b24-b1d9-43a083b496a9.png?resizew=216)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52fc79a016de89e54b04723f83e6ff35.png)
您最近一年使用:0次