如图1所示,利用皮带传动将物块从低处运到高处,物块与皮带相对

 如图1所示,利用皮带传动将物块从低处运到高处,物块与皮带相对静止.试分析物块所受的摩擦力.

答案


见解析
【试题分析】
假设皮带光滑,物体将沿斜面下滑,因而物块随皮带一起向上运动时,物块相对于皮带有向下滑动的趋势,则物块受到静摩擦力的作用,其方向与相对运动趋势的方向相反(即沿皮带向上).

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