求做几题理论力学的题目1.当物体处于临界平衡状态时,静摩擦力的大小( ) (A)与物体的重量成正比 (B)与物体的重力在支承面的法线方向的大小成正比 (C)与相互接触物体之间的正压力大小
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![求做几题理论力学的题目1.当物体处于临界平衡状态时,静摩擦力的大小( ) (A)与物体的重量成正比 (B)与物体的重力在支承面的法线方向的大小成正比 (C)与相互接触物体之间的正压力大小](/uploads/image/z/3970330-34-0.jpg?t=%E6%B1%82%E5%81%9A%E5%87%A0%E9%A2%98%E7%90%86%E8%AE%BA%E5%8A%9B%E5%AD%A6%E7%9A%84%E9%A2%98%E7%9B%AE1%EF%BC%8E%E5%BD%93%E7%89%A9%E4%BD%93%E5%A4%84%E4%BA%8E%E4%B8%B4%E7%95%8C%E5%B9%B3%E8%A1%A1%E7%8A%B6%E6%80%81%E6%97%B6%2C%E9%9D%99%E6%91%A9%E6%93%A6%E5%8A%9B%E7%9A%84%E5%A4%A7%E5%B0%8F%28++%29+%28A%29%E4%B8%8E%E7%89%A9%E4%BD%93%E7%9A%84%E9%87%8D%E9%87%8F%E6%88%90%E6%AD%A3%E6%AF%94+++++%28B%29%E4%B8%8E%E7%89%A9%E4%BD%93%E7%9A%84%E9%87%8D%E5%8A%9B%E5%9C%A8%E6%94%AF%E6%89%BF%E9%9D%A2%E7%9A%84%E6%B3%95%E7%BA%BF%E6%96%B9%E5%90%91%E7%9A%84%E5%A4%A7%E5%B0%8F%E6%88%90%E6%AD%A3%E6%AF%94+%28C%29%E4%B8%8E%E7%9B%B8%E4%BA%92%E6%8E%A5%E8%A7%A6%E7%89%A9%E4%BD%93%E4%B9%8B%E9%97%B4%E7%9A%84%E6%AD%A3%E5%8E%8B%E5%8A%9B%E5%A4%A7%E5%B0%8F)
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