题目内容
如图所示,重量为G的均匀链条,两端用等长的轻绳连接挂在等高的地方,绳与水平线成
角,试求:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241151098922349.gif)
(1)绳子的张力:
(2)链条最低点的张力。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115109876200.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241151098922349.gif)
(1)绳子的张力:
(2)链条最低点的张力。
(1)
(2)![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115109923367.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115109907428.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115109923367.gif)
(1)对链条受力分析,由三力汇交原理可得
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241151099381498.gif)
T =
(2)对左亲根链条受力分析
由三力汇交原理可得
F =
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115109985436.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241151099381498.gif)
T =
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115109907428.gif)
(2)对左亲根链条受力分析
由三力汇交原理可得
F =
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115109923367.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115109985436.gif)
![](http://thumb2018.1010pic.com/images/loading.gif)
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