题目内容
一辆汽车由O点从静止出发做匀加速直线运动,加速度大小为
,先后通过A、B两点,到达B点时的速度为
,已知汽车由A运动到B的时间为
,则A、B两点间的距离为( )
A.
B.![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002356292544.png)
C.
D.![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002356323651.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002356214283.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002356230265.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002356261267.png)
A.
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002356261639.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002356292544.png)
C.
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002356308445.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002356323651.png)
A
试题分析:根据匀加速直线运动和匀减速直线运动的可逆性,可得从A到B的运动可看做从B到A的匀减速运动,B点速度为v,故AB之间的距离为
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002356339695.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002356292544.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002356308445.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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