如图所示,质量为m的长木板AB静止在水平面上,木板长d0=5m,与地之间的动摩擦因数μ0=0.1.质量也为m的小铁块置于木板左端A处,木板上表面AC部分长的=0.2d0,AC间与小铁块之间的动摩擦因数μ1=5μ0.木
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