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甲、乙两物体相距s,它们同时同向运动,乙在前面做初速度为0、加速度为a1的匀加速...

甲、乙两物体相距s,它们同时同向运动,乙在前面做初速度为0、加速度为a1的匀加速动,甲在后面做初速度为v0、加速度为a2的匀加速运动,则(     )

A.若a1=a2,它们只能相遇一次    B.若a1>a2,它们可能相遇两次

C.若a1>a2,它们只能相遇一次       D.若a1<a2,它们只能相遇一次

 

ABD 【解析】略
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