已知长为L的光滑斜面,物体从斜面顶端由静止开始以恒定加速度下

已知长为L的光滑斜面,物体从斜面顶端由静止开始以恒定加速度下滑,当物体的速度是到达斜面底端速度的时,它沿斜面下滑的距离是:

A.            B.         C.              D.

 

答案

C

解析:略

 

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