题目内容
A、B两物体叠放在一起,放在光滑的水平面上,从静止开始受到一变力的作用,该力与时间的关系如图所示,A、B始终相对静止,则在0 ~ 2t0时间内,下列说法正确的是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250001539712075.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250001539872459.png)
A.t0时刻,A、B间静摩擦力最大
B.t0时刻,A、B速度最大
C.2t0时刻,A、B速度最小,与初始时刻相等
D.2t0时刻,A、B位移最大
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250001539712075.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250001539872459.png)
A.t0时刻,A、B间静摩擦力最大
B.t0时刻,A、B速度最大
C.2t0时刻,A、B速度最小,与初始时刻相等
D.2t0时刻,A、B位移最大
BCD
试题分析:由于A、B始终相对静止,具有共同的加速度,由牛顿第二定律,可得
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000154003741.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000154003942.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000154034435.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000154049319.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000154065501.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825000154081407.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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