a、b两个物体从同一地点同时出发,沿同一方向做匀变速直线运动,

a、b两个物体从同一地点同时出发,沿同一方向做匀变速直线运动,若初速度不同,加速度相同,则在运动过程中 ,下列说法正确的是:                                           

A.a、b的速度之差保持不变

B.a、b的速度之差与时间成正比

C.a、b的位移之差与时间成正比

D.a、b的位移之差与时间的平方成正比

答案

AC


解析:

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