如图所示质量为m的物体在沿斜面�上的拉力f作用下沿放在水平地面上的质量为m的倾角为粗糙斜面匀速下�此过程中斜面保持静止则地面对斜面 A Template




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tomski如图所示质量为m的物体在沿斜面�上的拉力f作用下沿放在水平地面上的质量为m的倾角为粗糙斜面匀速下�此过程中斜面保持静止则地面对斜面 a coloring