如图所示物体m在沿斜面�上的拉力f1作用下沿斜面匀速下�.此过程中斜面仍静止斜面质量为m则水平地面对斜面体 A无�擦力 b有水平 Template




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tomski如图所示物体m在沿斜面�上的拉力f1作用下沿斜面匀速下�.此过程中斜面仍静止斜面质量为m则水平地面对斜面体 a无�擦力 b有水平 coloring