甲、乙两物体先后从同一地点出发,沿一条直线运动,它们的v﹣t图

甲、乙两物体先后从同一地点出发,沿一条直线运动,它们的vt图象如图所示,由图可知(                                                                                                                                            

                                                                                                  

    A  甲比乙运动快,且早出发,所以乙追不上甲

    B  由于乙在t=10s时才开始运动,所以t=10s时,甲在乙前面,它们之间的距离为乙追上甲前最大

    C  t=20s时,它们之间的距离为乙追上甲前最大

    D  t=30s时,乙追上了甲

                                                                                                                                     

答案

C

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