题目内容
一辆公共汽车进站后开始刹车,做匀减速运动,其前3 s的v—t图象如图所示,则刹车后6 s内的位移是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250028178114784.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250028178114784.png)
A.10 m | B.12 m | C.12.5 m | D.13 m |
C
试题分析:由速度-时间图像可知,斜率等于汽车的加速度,加速度等于a="-1" m/s2,汽车减速到零,根据速度公式,有
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002817811510.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002817842946.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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题目内容
A.10 m | B.12 m | C.12.5 m | D.13 m |