有关简单机械和功的题目 滑轮组如图所示,吊篮的重力为400N,动滑轮重为50N,定滑轮重力为40N,人的重力为600N,人在吊篮里拉着绳子不动时人需用力A.218N B.220N C.210N D.236N先在这里谢谢你图图
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![有关简单机械和功的题目 滑轮组如图所示,吊篮的重力为400N,动滑轮重为50N,定滑轮重力为40N,人的重力为600N,人在吊篮里拉着绳子不动时人需用力A.218N B.220N C.210N D.236N先在这里谢谢你图图](/uploads/image/z/4986197-53-7.jpg?t=%E6%9C%89%E5%85%B3%E7%AE%80%E5%8D%95%E6%9C%BA%E6%A2%B0%E5%92%8C%E5%8A%9F%E7%9A%84%E9%A2%98%E7%9B%AE+%E6%BB%91%E8%BD%AE%E7%BB%84%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E5%90%8A%E7%AF%AE%E7%9A%84%E9%87%8D%E5%8A%9B%E4%B8%BA400N%2C%E5%8A%A8%E6%BB%91%E8%BD%AE%E9%87%8D%E4%B8%BA50N%2C%E5%AE%9A%E6%BB%91%E8%BD%AE%E9%87%8D%E5%8A%9B%E4%B8%BA40N%2C%E4%BA%BA%E7%9A%84%E9%87%8D%E5%8A%9B%E4%B8%BA600N%2C%E4%BA%BA%E5%9C%A8%E5%90%8A%E7%AF%AE%E9%87%8C%E6%8B%89%E7%9D%80%E7%BB%B3%E5%AD%90%E4%B8%8D%E5%8A%A8%E6%97%B6%E4%BA%BA%E9%9C%80%E7%94%A8%E5%8A%9BA%EF%BC%8E218N+B%EF%BC%8E220N+C%EF%BC%8E210N+D%EF%BC%8E236N%E5%85%88%E5%9C%A8%E8%BF%99%E9%87%8C%E8%B0%A2%E8%B0%A2%E4%BD%A0%E5%9B%BE%E5%9B%BE)
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