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匀变速直线运动

> 如图所示，光滑斜面上的四段距离相等，质点从O点由静止开始下滑，做匀加速直线运动，先后通过a、b、c、d…，下列说法正确的是（） A．质点由O到达各点的时间之比ta∶tb∶tc∶td＝1∶2∶3∶4 B．质点通过各点的速率之比va∶vb∶vc∶vd＝ C．在斜面上运动的平均速度 D．在斜面上运动的平均速度

问题：

发布时间：2024-09-10

如图所示，光滑斜面上的四段距离相等，质点从O点由静止开始下滑，做匀加速直线运动，先后通过a、b、c、d…，下列说法正确的是（）

A．质点由O到达各点的时间之比t_a∶t_b∶t_c∶t_d＝1∶2∶3∶4

B．质点通过各点的速率之比v_a∶v_b∶v_c∶v_d＝

C．在斜面上运动的平均速度

D．在斜面上运动的平均速度

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