题目内容
如图所示,甲图为光滑水平面上质量为
的物体,用细线通过定滑轮与质量为
的物体相连,由静止释放,乙图为同一物体
在光滑水平面上用细线通过定滑轮竖直向下受到拉力
的作用,拉力
的大小与
的重力相等,由静止释放,开始时
距桌边的距离相等,则( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082413174250122567.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131742142405.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131742283346.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131742142405.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131742345303.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131742345303.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131742283346.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131742142405.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082413174250122567.png)
A.甲、乙两图中![]() ![]() |
B.甲图中![]() ![]() ![]() ![]() |
C.乙图中绳子受到的拉力较大 |
D.甲图中![]() |
BCD
根据牛顿运动定律,甲图中
,
;拉力TM=MaM,乙图中
,
,拉力Tm=Mam,则TM< Tm,A错误、BC正确;根据运动学公式
,
,位移相同,加速度小的,则时间长,速度小,D正确。
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131742922900.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131742735874.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131742969804.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131742844772.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131743047599.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824131743078528.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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