题目内容
如图所示 ,物体在水平方向受
、
两个力的作用,
方向向右,
方向向左,大小分别为
和
。则物体所受合力的大小和方向为:( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824194036193891.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824194031217333.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824194031981353.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824194031217333.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824194031981353.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824194034633569.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824194035413578.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824194036193891.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
C
试题分析:由于两个力的方向相反,因此合力为两力之差6N,方向与较大的力相同,故选C
点评:本题难度较小,当两个力共线时,求合力时为简单的标量计算
![](http://thumb2018.1010pic.com/images/loading.gif)
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A.![]() | B.![]() |
C.![]() | D.![]() |