一个人用如图所示的滑轮组提升2000牛的货物,所用拉力为600 牛,身子自由端4 s内拉下4m个人用如图所示的滑轮组提升2000牛的货物,所用拉力为600 牛,绳子自由端4 s内拉下4m,求有用功和总功率,不
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![一个人用如图所示的滑轮组提升2000牛的货物,所用拉力为600 牛,身子自由端4 s内拉下4m个人用如图所示的滑轮组提升2000牛的货物,所用拉力为600 牛,绳子自由端4 s内拉下4m,求有用功和总功率,不](/uploads/image/z/6693563-11-3.jpg?t=%E4%B8%80%E4%B8%AA%E4%BA%BA%E7%94%A8%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%E7%9A%84%E6%BB%91%E8%BD%AE%E7%BB%84%E6%8F%90%E5%8D%872000%E7%89%9B%E7%9A%84%E8%B4%A7%E7%89%A9%2C%E6%89%80%E7%94%A8%E6%8B%89%E5%8A%9B%E4%B8%BA600+%E7%89%9B%2C%E8%BA%AB%E5%AD%90%E8%87%AA%E7%94%B1%E7%AB%AF4+s%E5%86%85%E6%8B%89%E4%B8%8B4m%E4%B8%AA%E4%BA%BA%E7%94%A8%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%E7%9A%84%E6%BB%91%E8%BD%AE%E7%BB%84%E6%8F%90%E5%8D%872000%E7%89%9B%E7%9A%84%E8%B4%A7%E7%89%A9%2C%E6%89%80%E7%94%A8%E6%8B%89%E5%8A%9B%E4%B8%BA600+%E7%89%9B%2C%E7%BB%B3%E5%AD%90%E8%87%AA%E7%94%B1%E7%AB%AF4+s%E5%86%85%E6%8B%89%E4%B8%8B4m%2C%E6%B1%82%E6%9C%89%E7%94%A8%E5%8A%9F%E5%92%8C%E6%80%BB%E5%8A%9F%E7%8E%87%2C%E4%B8%8D)
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