题目内容
a、b两车在平直公路上行驶,其v-t图象如图所示,在t=0时,两车间距为s0,在t=t1时间内,a车的位移大小为s,则( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250025078492838.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250025078492838.jpg)
A.0- t1时间内a、b两车相向而行 |
B.0- t1时间内a车平均速度大小是b车平均速度大小的2倍 |
C.若a、b在t1时刻相遇,则s0=![]() |
D.若a、b在![]() |
C
试题分析:由图像可知0- t1时间内两车速度均为正,故同向行驶,A错;0- t1时间内两车平均速度大小分别是
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002507912798.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002507927559.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250025079434828.png)
图像与坐标轴所围成的面积表示对应过程的位移,故C正确;若a、b在
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002507881405.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002507881405.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250025079905820.png)
故下次相遇的时刻为
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002508005475.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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