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匀变速直线运动

> 一个初速为零的物体，做加速度为a的匀加速直线运动，运动的时间为t，则下列叙述中正确的是(　　) A．它运动全程的平均速度为 B．ts末的速度比(t－1)s末的速度大2a C．它总的位移为0.5a t2 D．1s末、3s末、5s末的速度之比为1∶3∶5

问题：

发布时间：2024-09-07

一个初速为零的物体，做加速度为a的匀加速直线运动，运动的时间为t，则下列叙述中正确的是(　　)

A．它运动全程的平均速度为

B．ts末的速度比(t－1)s末的速度大2a

C．它总的位移为0.5a t²

D．1s末、3s末、5s末的速度之比为1∶3∶5

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一个初速为零的物体，做加速度为a的匀加速直线运动，运动的时间为t，则下列叙述中正确的是( ) A．它运动全程的平均速度为 B．ts末的速度比(t－1)s末的速度大2a C．它总的位移为0.5a t2 D．1s末、3s末、5s末的速度之比为1∶3∶5

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