重量为120N物体放置在粗糙的水平桌面上,物体与桌面的动摩擦因素为0.20,现受到一个与水平成30°角斜向下的推力作用,则要使物体A做匀速直线运动的推力大小为多少
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![重量为120N物体放置在粗糙的水平桌面上,物体与桌面的动摩擦因素为0.20,现受到一个与水平成30°角斜向下的推力作用,则要使物体A做匀速直线运动的推力大小为多少](/uploads/image/z/1519725-21-5.jpg?t=%E9%87%8D%E9%87%8F%E4%B8%BA120N%E7%89%A9%E4%BD%93%E6%94%BE%E7%BD%AE%E5%9C%A8%E7%B2%97%E7%B3%99%E7%9A%84%E6%B0%B4%E5%B9%B3%E6%A1%8C%E9%9D%A2%E4%B8%8A%2C%E7%89%A9%E4%BD%93%E4%B8%8E%E6%A1%8C%E9%9D%A2%E7%9A%84%E5%8A%A8%E6%91%A9%E6%93%A6%E5%9B%A0%E7%B4%A0%E4%B8%BA0.20%2C%E7%8E%B0%E5%8F%97%E5%88%B0%E4%B8%80%E4%B8%AA%E4%B8%8E%E6%B0%B4%E5%B9%B3%E6%88%9030%C2%B0%E8%A7%92%E6%96%9C%E5%90%91%E4%B8%8B%E7%9A%84%E6%8E%A8%E5%8A%9B%E4%BD%9C%E7%94%A8%2C%E5%88%99%E8%A6%81%E4%BD%BF%E7%89%A9%E4%BD%93A%E5%81%9A%E5%8C%80%E9%80%9F%E7%9B%B4%E7%BA%BF%E8%BF%90%E5%8A%A8%E7%9A%84%E6%8E%A8%E5%8A%9B%E5%A4%A7%E5%B0%8F%E4%B8%BA%E5%A4%9A%E5%B0%91)
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