1.如图所示斜面体m放在粗糙的水平面上小物块m沿斜面体的粗糙斜面加速下�此时地面对斜面体m的静�擦力大小为f1若用一平行于斜面�下的 Template




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tomski1.如图所示斜面体m放在粗糙的水平面上小物块m沿斜面体的粗糙斜面加速下�此时地面对斜面体m的静�擦力大小为f1若用一平行于斜面�下的 coloring