G物=2000N,F=800N,绳自由端被拉下4m,则w总= J,w有用= J,η= (图是动滑轮,5股绳子)1.G物=2000N,F=800N,绳自由端被拉下4m,则w总= J,w有用= J,η=(图是动滑轮,5股绳子)2.甲乙两种方式提升同一
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![G物=2000N,F=800N,绳自由端被拉下4m,则w总= J,w有用= J,η= (图是动滑轮,5股绳子)1.G物=2000N,F=800N,绳自由端被拉下4m,则w总= J,w有用= J,η=(图是动滑轮,5股绳子)2.甲乙两种方式提升同一](/uploads/image/z/8507632-40-2.jpg?t=G%E7%89%A9%3D2000N%2CF%3D800N%2C%E7%BB%B3%E8%87%AA%E7%94%B1%E7%AB%AF%E8%A2%AB%E6%8B%89%E4%B8%8B4m%2C%E5%88%99w%E6%80%BB%3D+J%2Cw%E6%9C%89%E7%94%A8%3D+J%2C%CE%B7%3D+%EF%BC%88%E5%9B%BE%E6%98%AF%E5%8A%A8%E6%BB%91%E8%BD%AE%2C5%E8%82%A1%E7%BB%B3%E5%AD%90%EF%BC%891.G%E7%89%A9%3D2000N%2CF%3D800N%2C%E7%BB%B3%E8%87%AA%E7%94%B1%E7%AB%AF%E8%A2%AB%E6%8B%89%E4%B8%8B4m%2C%E5%88%99w%E6%80%BB%3D+++++++++J%2Cw%E6%9C%89%E7%94%A8%3D++++++++J%2C%CE%B7%3D%EF%BC%88%E5%9B%BE%E6%98%AF%E5%8A%A8%E6%BB%91%E8%BD%AE%2C5%E8%82%A1%E7%BB%B3%E5%AD%90%EF%BC%892.%E7%94%B2%E4%B9%99%E4%B8%A4%E7%A7%8D%E6%96%B9%E5%BC%8F%E6%8F%90%E5%8D%87%E5%90%8C%E4%B8%80)
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