题目内容
一辆车由甲地出发,沿平直公路开到乙地刚好停止,其速度图象如图所示,那么0—t和t—3t两段时间内,下列说法正确的是 ( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250026586722608.jpg)
(1)加速度大小之比为2: 1
(2)位移大小之比为1: 2
(3)平均速度大小之比为1: 2
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250026586722608.jpg)
(1)加速度大小之比为2: 1
(2)位移大小之比为1: 2
(3)平均速度大小之比为1: 2
A.(1)(2) | B.(1)(3) | C.(2)(3) | D.(1)(2)(3) |
A
试题分析:0—t和t—3t两段时间内,
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002658688318.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002658703410.png)
由
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002658719436.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002658750448.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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