题目内容
两个共点力,一个大小为50N,另一个为F,这两个力的合力大小是150N,则F大小的取值范围是( )
A.50N≤F≤150N | B.F≥200N | C.F≥150N | D.100N≤F≤200N |
D
根据合力与分力大小关系式可得:
,带入可得
,解得:![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123612269708.png)
故选D,
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123612238813.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123612253733.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824123612269708.png)
故选D,
![](http://thumb2018.1010pic.com/images/loading.gif)
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题目内容
A.50N≤F≤150N | B.F≥200N | C.F≥150N | D.100N≤F≤200N |