帮忙解决一道关于物理上面滑轮的题用图所示的滑轮组,拉动物体A在水平地面上匀速运动时,弹簧测力计的示数为3N.在忽略轮重、绳重和轴摩擦的情况下,求施加在绳子自由端的拉力F1多大?物体
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![帮忙解决一道关于物理上面滑轮的题用图所示的滑轮组,拉动物体A在水平地面上匀速运动时,弹簧测力计的示数为3N.在忽略轮重、绳重和轴摩擦的情况下,求施加在绳子自由端的拉力F1多大?物体](/uploads/image/z/11395992-48-2.jpg?t=%E5%B8%AE%E5%BF%99%E8%A7%A3%E5%86%B3%E4%B8%80%E9%81%93%E5%85%B3%E4%BA%8E%E7%89%A9%E7%90%86%E4%B8%8A%E9%9D%A2%E6%BB%91%E8%BD%AE%E7%9A%84%E9%A2%98%E7%94%A8%E5%9B%BE%E6%89%80%E7%A4%BA%E7%9A%84%E6%BB%91%E8%BD%AE%E7%BB%84%2C%E6%8B%89%E5%8A%A8%E7%89%A9%E4%BD%93A%E5%9C%A8%E6%B0%B4%E5%B9%B3%E5%9C%B0%E9%9D%A2%E4%B8%8A%E5%8C%80%E9%80%9F%E8%BF%90%E5%8A%A8%E6%97%B6%2C%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%BA3N.%E5%9C%A8%E5%BF%BD%E7%95%A5%E8%BD%AE%E9%87%8D%E3%80%81%E7%BB%B3%E9%87%8D%E5%92%8C%E8%BD%B4%E6%91%A9%E6%93%A6%E7%9A%84%E6%83%85%E5%86%B5%E4%B8%8B%2C%E6%B1%82%E6%96%BD%E5%8A%A0%E5%9C%A8%E7%BB%B3%E5%AD%90%E8%87%AA%E7%94%B1%E7%AB%AF%E7%9A%84%E6%8B%89%E5%8A%9BF1%E5%A4%9A%E5%A4%A7%3F%E7%89%A9%E4%BD%93)
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