如图,已知动滑轮重50N,绳子自由端拉力为250N,小丽以此力把物体均速上升了6m,共用了10S,求:1小丽做功的功率2滑轮组的机械效率3若物体的质量为m,以此滑轮组来提升此物体,求滑轮组机械效率
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![如图,已知动滑轮重50N,绳子自由端拉力为250N,小丽以此力把物体均速上升了6m,共用了10S,求:1小丽做功的功率2滑轮组的机械效率3若物体的质量为m,以此滑轮组来提升此物体,求滑轮组机械效率](/uploads/image/z/8666526-30-6.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%B7%B2%E7%9F%A5%E5%8A%A8%E6%BB%91%E8%BD%AE%E9%87%8D50N%2C%E7%BB%B3%E5%AD%90%E8%87%AA%E7%94%B1%E7%AB%AF%E6%8B%89%E5%8A%9B%E4%B8%BA250N%2C%E5%B0%8F%E4%B8%BD%E4%BB%A5%E6%AD%A4%E5%8A%9B%E6%8A%8A%E7%89%A9%E4%BD%93%E5%9D%87%E9%80%9F%E4%B8%8A%E5%8D%87%E4%BA%866m%2C%E5%85%B1%E7%94%A8%E4%BA%8610S%2C%E6%B1%82%EF%BC%9A1%E5%B0%8F%E4%B8%BD%E5%81%9A%E5%8A%9F%E7%9A%84%E5%8A%9F%E7%8E%872%E6%BB%91%E8%BD%AE%E7%BB%84%E7%9A%84%E6%9C%BA%E6%A2%B0%E6%95%88%E7%8E%873%E8%8B%A5%E7%89%A9%E4%BD%93%E7%9A%84%E8%B4%A8%E9%87%8F%E4%B8%BAm%2C%E4%BB%A5%E6%AD%A4%E6%BB%91%E8%BD%AE%E7%BB%84%E6%9D%A5%E6%8F%90%E5%8D%87%E6%AD%A4%E7%89%A9%E4%BD%93%2C%E6%B1%82%E6%BB%91%E8%BD%AE%E7%BB%84%E6%9C%BA%E6%A2%B0%E6%95%88%E7%8E%87)
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