题目内容
如图所示,四根相同的轻弹簧连接着相同的物体,在外力作用下做不同的运动:图(a)中,物体在光滑水平面上做加速度大小为g的匀加速直线运动;图(b)中,物体在倾角为30°的光滑斜面上做沿斜面向上的匀速直线运动;图(c)中,物体以加速度
做竖直向下的匀加速直线运动;(d)中,物体以加速度
做竖直向上的匀加速直线运动.设四根轻弹簧伸长量分别为
、
、
、
。下列选项中错误的是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241433110805580.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143310752508.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143310830387.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143310877426.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143310939450.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143310986452.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143311033449.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241433110805580.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
D
在a图中
,在b图中
,在c图中
,在d图中
,由此可知
>
、
<
、
<
、
<
,D 错;
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143311953679.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143312016929.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143312109893.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143312187745.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143310877426.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143311220447.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143310986452.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143311033449.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143310877426.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143311033449.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143310939450.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824143311033449.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目