-如图所示,重20牛的物体甲被夹在两块相同的板中间,当两块板各受到50牛的水平压力时甲刚好能匀速下滑,-------若要将从上方匀速抽出来,所用的拉力为_________牛.
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/30 06:55:59
![-如图所示,重20牛的物体甲被夹在两块相同的板中间,当两块板各受到50牛的水平压力时甲刚好能匀速下滑,-------若要将从上方匀速抽出来,所用的拉力为_________牛.](/uploads/image/z/4366985-41-5.jpg?t=-%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E9%87%8D20%E7%89%9B%E7%9A%84%E7%89%A9%E4%BD%93%E7%94%B2%E8%A2%AB%E5%A4%B9%E5%9C%A8%E4%B8%A4%E5%9D%97%E7%9B%B8%E5%90%8C%E7%9A%84%E6%9D%BF%E4%B8%AD%E9%97%B4%2C%E5%BD%93%E4%B8%A4%E5%9D%97%E6%9D%BF%E5%90%84%E5%8F%97%E5%88%B050%E7%89%9B%E7%9A%84%E6%B0%B4%E5%B9%B3%E5%8E%8B%E5%8A%9B%E6%97%B6%E7%94%B2%E5%88%9A%E5%A5%BD%E8%83%BD%E5%8C%80%E9%80%9F%E4%B8%8B%E6%BB%91%2C-------%E8%8B%A5%E8%A6%81%E5%B0%86%E4%BB%8E%E4%B8%8A%E6%96%B9%E5%8C%80%E9%80%9F%E6%8A%BD%E5%87%BA%E6%9D%A5%2C%E6%89%80%E7%94%A8%E7%9A%84%E6%8B%89%E5%8A%9B%E4%B8%BA_________%E7%89%9B.)
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