如图人站在地面上使用图中的�轮组将重为g的物体匀速提升到高处.请用笔画线表示绳子将�轮组组装起来人的拉力用f表示.如果不计动�轮的重力 Template




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tomski如图人站在地面上使用图中的�轮组将重为g的物体匀速提升到高处.请用笔画线表示绳子将�轮组组装起来人的拉力用f表示.如果不计动�轮的重力 coloring