滑轮组在10s内将重物提升了10m,绳子自由端的拉力大小为200N,滑轮组的机械效率为85%(1)拉力的功率;(2)物体的重力;(3)用此滑轮组提起580N重物时,所需拉力多大?股数3
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![滑轮组在10s内将重物提升了10m,绳子自由端的拉力大小为200N,滑轮组的机械效率为85%(1)拉力的功率;(2)物体的重力;(3)用此滑轮组提起580N重物时,所需拉力多大?股数3](/uploads/image/z/1523625-33-5.jpg?t=%E6%BB%91%E8%BD%AE%E7%BB%84%E5%9C%A810s%E5%86%85%E5%B0%86%E9%87%8D%E7%89%A9%E6%8F%90%E5%8D%87%E4%BA%8610m%2C%E7%BB%B3%E5%AD%90%E8%87%AA%E7%94%B1%E7%AB%AF%E7%9A%84%E6%8B%89%E5%8A%9B%E5%A4%A7%E5%B0%8F%E4%B8%BA200N%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%BA85%25%281%29%E6%8B%89%E5%8A%9B%E7%9A%84%E5%8A%9F%E7%8E%87%EF%BC%9B%282%29%E7%89%A9%E4%BD%93%E7%9A%84%E9%87%8D%E5%8A%9B%EF%BC%9B%283%29%E7%94%A8%E6%AD%A4%E6%BB%91%E8%BD%AE%E7%BB%84%E6%8F%90%E8%B5%B7580N%E9%87%8D%E7%89%A9%E6%97%B6%2C%E6%89%80%E9%9C%80%E6%8B%89%E5%8A%9B%E5%A4%9A%E5%A4%A7%3F%E8%82%A1%E6%95%B03)
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