题目内容
如图是某质点运动的v—t图象,由图象得到的正确结果是
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250010436083028.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250010436083028.jpg)
A.0~1 s内的平均速度是1 m/s |
B.0~2 s内的位移大小是3 m |
C.0~1 s内的加速度小于2~4 s内的加速度 |
D.0~1 s内的运动方向与2~4 s内的运动方向相反 |
AB
试题分析:0~1 s内,初速度为0,末速度为2m/s,平均速度
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001043623827.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001043639268.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001043686832.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001043639268.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001043701265.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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