力学分析题
来源:学生作业帮 编辑:神马作文网作业帮 分类:物理作业 时间:2024/11/10 07:30:48
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解题思路: 1,AB整体为研究对象,水平方向受拉力和摩擦力做匀速运动,是一对平衡力,可以知道A受的摩擦力大小为12N,方向水平向左.以B为研究对象,在水平方向不受力,所以摩擦力为0. 2AB匀速运动,推力与摩擦力是一对平衡力,有决定摩擦力大小因素可以知道摩擦力不变为12N,所以推力为12N.
解题过程:
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最终答案:略
解题过程:
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最终答案:略