如图所示对斜面上的物体施加一个沿斜面�上的拉力f作用时物体恰能沿斜面匀速下�在此过程中斜面体相对水平地面静止不动则水平地面对斜面体 Template




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tomski如图所示对斜面上的物体施加一个沿斜面�上的拉力f作用时物体恰能沿斜面匀速下�在此过程中斜面体相对水平地面静止不动则水平地面对斜面体 coloring