1.质量为50kg的雪橇上装载了350kg的货物,一匹马拉着它沿水平道路将货物匀速运到了3000m外的货场,做了2.1×106J的功,则雪橇在行进中受到的摩擦力多少.是不是马克服摩擦做功?2.1×106J / 3000m =700N
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![1.质量为50kg的雪橇上装载了350kg的货物,一匹马拉着它沿水平道路将货物匀速运到了3000m外的货场,做了2.1×106J的功,则雪橇在行进中受到的摩擦力多少.是不是马克服摩擦做功?2.1×106J / 3000m =700N](/uploads/image/z/529257-57-7.jpg?t=1.%E8%B4%A8%E9%87%8F%E4%B8%BA50kg%E7%9A%84%E9%9B%AA%E6%A9%87%E4%B8%8A%E8%A3%85%E8%BD%BD%E4%BA%86350kg%E7%9A%84%E8%B4%A7%E7%89%A9%2C%E4%B8%80%E5%8C%B9%E9%A9%AC%E6%8B%89%E7%9D%80%E5%AE%83%E6%B2%BF%E6%B0%B4%E5%B9%B3%E9%81%93%E8%B7%AF%E5%B0%86%E8%B4%A7%E7%89%A9%E5%8C%80%E9%80%9F%E8%BF%90%E5%88%B0%E4%BA%863000m%E5%A4%96%E7%9A%84%E8%B4%A7%E5%9C%BA%2C%E5%81%9A%E4%BA%862.1%C3%97106J%E7%9A%84%E5%8A%9F%2C%E5%88%99%E9%9B%AA%E6%A9%87%E5%9C%A8%E8%A1%8C%E8%BF%9B%E4%B8%AD%E5%8F%97%E5%88%B0%E7%9A%84%E6%91%A9%E6%93%A6%E5%8A%9B%E5%A4%9A%E5%B0%91.%E6%98%AF%E4%B8%8D%E6%98%AF%E9%A9%AC%E5%85%8B%E6%9C%8D%E6%91%A9%E6%93%A6%E5%81%9A%E5%8A%9F%3F2.1%C3%97106J+%2F+3000m+%3D700N)
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