甲乙两车在某时刻由同一地点沿同一方向开始做直线运动,若以该时

甲乙两车在某时刻由同一地点沿同一方向开始做直线运动,若以该时刻作为计时起点,得到两车的位移—时间图象如图所示,则下列说法正确的是                                                               (    )

       A.甲做匀加速直线运动,乙做变加速直线运动

       B.t1时刻两车的速度刚好相等t

       C.t1时刻乙车从后面追上甲车

       D.0到t1 时间内,乙车的平均速度小于甲车的平均速度

 

答案

C

解析:

 

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