如图所示是甲、乙两物体从同一点出发的位移一时间(x-t)图象,由

如图所示是甲、乙两物体从同一点出发的位移一时间(x-t)图象,由图象可以看 出在04s这段时间内

A. 甲、乙两物体始终同向运动

B. 4s时甲、乙两物体之间的距离最大

C. 甲的平均速度大于乙的平均速度

D. 甲、乙两物体之间的最大距离为3m

答案

【试题答案】D

【命题立意】以运动学图象为命题背景,考查学生对图象的认知能力。

【解    析】由图象可知,甲物体在2s后运动改变方向,所以A选项错误;2s末甲乙距离最大为3m,所以B选项错误,D选项正确;04s这段时间内甲乙位移相等,所以平均速度相等,所以C选项错误。

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