一个人用滑轮组匀速提升重G=128N的物体,滑轮组的机械效率为80%,在4S内人用F=10N的拉力使绳端移动4M.1.求出作用在动滑轮上的绳子的股数N
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![一个人用滑轮组匀速提升重G=128N的物体,滑轮组的机械效率为80%,在4S内人用F=10N的拉力使绳端移动4M.1.求出作用在动滑轮上的绳子的股数N](/uploads/image/z/5325699-3-9.jpg?t=%E4%B8%80%E4%B8%AA%E4%BA%BA%E7%94%A8%E6%BB%91%E8%BD%AE%E7%BB%84%E5%8C%80%E9%80%9F%E6%8F%90%E5%8D%87%E9%87%8DG%3D128N%E7%9A%84%E7%89%A9%E4%BD%93%2C%E6%BB%91%E8%BD%AE%E7%BB%84%E7%9A%84%E6%9C%BA%E6%A2%B0%E6%95%88%E7%8E%87%E4%B8%BA80%25%2C%E5%9C%A84S%E5%86%85%E4%BA%BA%E7%94%A8F%3D10N%E7%9A%84%E6%8B%89%E5%8A%9B%E4%BD%BF%E7%BB%B3%E7%AB%AF%E7%A7%BB%E5%8A%A84M.1.%E6%B1%82%E5%87%BA%E4%BD%9C%E7%94%A8%E5%9C%A8%E5%8A%A8%E6%BB%91%E8%BD%AE%E4%B8%8A%E7%9A%84%E7%BB%B3%E5%AD%90%E7%9A%84%E8%82%A1%E6%95%B0N)
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