题目内容
如图甲,某人正通过定滑轮将质量为m的货物提升到高处,滑轮的质量和摩擦均不计,货物获得的加速度
与绳子对货物竖直向上的拉力
之间的函数关系如图乙所示。由图可以判断: ( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250007281553029.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000728124283.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000728140304.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250007281553029.png)
A.图线与纵轴的交点M的值![]() |
B.图线与横轴的交点N的值![]() |
C.图线的斜率等于物体的质量m |
D.图线的斜率等于物体质量的倒数![]() |
ABD
试题分析:对货物作为研究对象,根据牛顿第二定律可得:
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000728218613.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000728233661.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000728171518.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000728186605.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000728202394.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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