题目内容
如图所示,t=0时,质量为0.5kg的物体从光滑斜面上的A点由静止开始匀加速下滑,经过B点后进入水平面(设经过B点前后速度大小不变),最后停在C点。测得每隔2 s的三个时刻物体的瞬时速度,记录在下表中。g取10m/s2,则下列说法中正确的是
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250010337026573.png)
A.物体运动过程中的最大速度为12 m/s
B.t ="3" s时物体恰好经过B点
C.t =10s时物体恰好停在C点
D.A、B间的距离大于B、C间距离
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250010337026573.png)
A.物体运动过程中的最大速度为12 m/s
B.t ="3" s时物体恰好经过B点
C.t =10s时物体恰好停在C点
D.A、B间的距离大于B、C间距离
C
试题分析:根据图表中的数据,由运动学公式
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001033717420.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001033749927.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250010337641099.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001033780737.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001033811513.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001033827545.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001033842483.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001033858979.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001033889791.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001033905681.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001033936728.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001033951778.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001033967778.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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