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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，经过ab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．前时间通过的位移比后时间通过的位移少1.5vt D．前位移所需的时间是后位移所需的时间的1.5倍

问题：

发布时间：2024-09-08

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，经过ab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．前时间通过的位移比后时间通过的位移少1.5vt

D．前位移所需的时间是后位移所需的时间的1.5倍

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