如图所示,是一种起重机的简图,用它把质量为4×10的三次方千克,底面积为1平方米的货物G匀速提起(1)当货物静止于水平地面时,它对地面的压强是多少(2)若把货物匀速吊起16M.用了40S.则货
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![如图所示,是一种起重机的简图,用它把质量为4×10的三次方千克,底面积为1平方米的货物G匀速提起(1)当货物静止于水平地面时,它对地面的压强是多少(2)若把货物匀速吊起16M.用了40S.则货](/uploads/image/z/11701010-2-0.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E6%98%AF%E4%B8%80%E7%A7%8D%E8%B5%B7%E9%87%8D%E6%9C%BA%E7%9A%84%E7%AE%80%E5%9B%BE%2C%E7%94%A8%E5%AE%83%E6%8A%8A%E8%B4%A8%E9%87%8F%E4%B8%BA4%C3%9710%E7%9A%84%E4%B8%89%E6%AC%A1%E6%96%B9%E5%8D%83%E5%85%8B%2C%E5%BA%95%E9%9D%A2%E7%A7%AF%E4%B8%BA1%E5%B9%B3%E6%96%B9%E7%B1%B3%E7%9A%84%E8%B4%A7%E7%89%A9G%E5%8C%80%E9%80%9F%E6%8F%90%E8%B5%B7%EF%BC%881%EF%BC%89%E5%BD%93%E8%B4%A7%E7%89%A9%E9%9D%99%E6%AD%A2%E4%BA%8E%E6%B0%B4%E5%B9%B3%E5%9C%B0%E9%9D%A2%E6%97%B6%2C%E5%AE%83%E5%AF%B9%E5%9C%B0%E9%9D%A2%E7%9A%84%E5%8E%8B%E5%BC%BA%E6%98%AF%E5%A4%9A%E5%B0%91%EF%BC%882%EF%BC%89%E8%8B%A5%E6%8A%8A%E8%B4%A7%E7%89%A9%E5%8C%80%E9%80%9F%E5%90%8A%E8%B5%B716M.%E7%94%A8%E4%BA%8640S.%E5%88%99%E8%B4%A7)
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