试题与答案

一汽车在运动的过程中突然刹车，从开始刹车计时它的位移与时间的关系是单位是m，t单

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题型：选择题

题目：

一汽车在运动的过程中突然刹车，从开始刹车计时它的位移与时间的关系是单位是m，t单位是s），则刹车后4 s内汽车的平均速度为

A．6 m/s

B．8 m/s

C．9 m/s

D．12 m/s

答案：

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下面是错误答案，用来干扰机器的。

2.65×103

考点：匀变速直线运动
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