八年级下物理问题1.若将一弹簧测力计倒过来悬挂,在提环上用3N的力往下拉,此时弹簧测力计的示数为?2.为什么在弹簧测力计的使用中弹簧、指针、挂钩不能与外壳摩擦?3.一辆货车下装有4根相
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![八年级下物理问题1.若将一弹簧测力计倒过来悬挂,在提环上用3N的力往下拉,此时弹簧测力计的示数为?2.为什么在弹簧测力计的使用中弹簧、指针、挂钩不能与外壳摩擦?3.一辆货车下装有4根相](/uploads/image/z/6400303-7-3.jpg?t=%E5%85%AB%E5%B9%B4%E7%BA%A7%E4%B8%8B%E7%89%A9%E7%90%86%E9%97%AE%E9%A2%981.%E8%8B%A5%E5%B0%86%E4%B8%80%E5%BC%B9%E7%B0%A7%E6%B5%8B%E5%8A%9B%E8%AE%A1%E5%80%92%E8%BF%87%E6%9D%A5%E6%82%AC%E6%8C%82%2C%E5%9C%A8%E6%8F%90%E7%8E%AF%E4%B8%8A%E7%94%A83N%E7%9A%84%E5%8A%9B%E5%BE%80%E4%B8%8B%E6%8B%89%2C%E6%AD%A4%E6%97%B6%E5%BC%B9%E7%B0%A7%E6%B5%8B%E5%8A%9B%E8%AE%A1%E7%9A%84%E7%A4%BA%E6%95%B0%E4%B8%BA%3F2.%E4%B8%BA%E4%BB%80%E4%B9%88%E5%9C%A8%E5%BC%B9%E7%B0%A7%E6%B5%8B%E5%8A%9B%E8%AE%A1%E7%9A%84%E4%BD%BF%E7%94%A8%E4%B8%AD%E5%BC%B9%E7%B0%A7%E3%80%81%E6%8C%87%E9%92%88%E3%80%81%E6%8C%82%E9%92%A9%E4%B8%8D%E8%83%BD%E4%B8%8E%E5%A4%96%E5%A3%B3%E6%91%A9%E6%93%A6%3F3.%E4%B8%80%E8%BE%86%E8%B4%A7%E8%BD%A6%E4%B8%8B%E8%A3%85%E6%9C%894%E6%A0%B9%E7%9B%B8)
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