工人通过用400N的拉力通过滑轮组使重600N的箱子以0.4m/s的速度从地面升到12m高的楼顶求工人做功的功率
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![工人通过用400N的拉力通过滑轮组使重600N的箱子以0.4m/s的速度从地面升到12m高的楼顶求工人做功的功率](/uploads/image/z/8267386-58-6.jpg?t=%E5%B7%A5%E4%BA%BA%E9%80%9A%E8%BF%87%E7%94%A8400N%E7%9A%84%E6%8B%89%E5%8A%9B%E9%80%9A%E8%BF%87%E6%BB%91%E8%BD%AE%E7%BB%84%E4%BD%BF%E9%87%8D600N%E7%9A%84%E7%AE%B1%E5%AD%90%E4%BB%A50.4m%2Fs%E7%9A%84%E9%80%9F%E5%BA%A6%E4%BB%8E%E5%9C%B0%E9%9D%A2%E5%8D%87%E5%88%B012m%E9%AB%98%E7%9A%84%E6%A5%BC%E9%A1%B6%E6%B1%82%E5%B7%A5%E4%BA%BA%E5%81%9A%E5%8A%9F%E7%9A%84%E5%8A%9F%E7%8E%87)
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