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匀变速直线运动

> 一个做匀加速直线运动的物体，先后经过a、b两点时的速度分别是v和7v，通过ab段的时间是t，则下列判断正确的是 A．经过ab中点的速度是4v B．经过ab中间时刻的速度是4v C．前t/2时间通过的位移比后t/2时间通过的位移少l.5vt D．前1/2位移所需的时间是后1/2位移所需时间的2倍

问题：

发布时间：2024-09-13

一个做匀加速直线运动的物体，先后经过a、b两点时的速度分别是v和7v，通过ab段的时间是t，则下列判断正确的是

A．经过ab中点的速度是4v

B．经过ab中间时刻的速度是4v

C．前t/2时间通过的位移比后t/2时间通过的位移少l.5vt

D．前1/2位移所需的时间是后1/2位移所需时间的2倍

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