试题与答案

一辆汽车从车站以初速度为零做匀加速直线运动一段时间之后,司机发现一乘客未上车,立

题型:选择题

题目:

一辆汽车从车站以初速度为零做匀加速直线运动一段时间之后,司机发现一乘客未上车,立即紧急刹车,使汽车做匀减速直线运动,汽车从启动到停止一共经历t="10" s,前进了15m,在此过程中,汽车的最大速度为(   )

A.1.5 m/s

B.3 m/s

C.4 m/s

D.无法确定

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B

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