你好.一质量为m的物体恰能在质量为M的斜劈上匀速下滑,斜劈保持静止.现用一沿斜向下的外力F推此物体,使物体加速下滑,设此过程中斜劈受到地面的摩擦力为Ff,支持力为FN,求Ff和FN. 还是这道
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![你好.一质量为m的物体恰能在质量为M的斜劈上匀速下滑,斜劈保持静止.现用一沿斜向下的外力F推此物体,使物体加速下滑,设此过程中斜劈受到地面的摩擦力为Ff,支持力为FN,求Ff和FN. 还是这道](/uploads/image/z/4898141-53-1.jpg?t=%E4%BD%A0%E5%A5%BD.%E4%B8%80%E8%B4%A8%E9%87%8F%E4%B8%BAm%E7%9A%84%E7%89%A9%E4%BD%93%E6%81%B0%E8%83%BD%E5%9C%A8%E8%B4%A8%E9%87%8F%E4%B8%BAM%E7%9A%84%E6%96%9C%E5%8A%88%E4%B8%8A%E5%8C%80%E9%80%9F%E4%B8%8B%E6%BB%91%2C%E6%96%9C%E5%8A%88%E4%BF%9D%E6%8C%81%E9%9D%99%E6%AD%A2.%E7%8E%B0%E7%94%A8%E4%B8%80%E6%B2%BF%E6%96%9C%E5%90%91%E4%B8%8B%E7%9A%84%E5%A4%96%E5%8A%9BF%E6%8E%A8%E6%AD%A4%E7%89%A9%E4%BD%93%2C%E4%BD%BF%E7%89%A9%E4%BD%93%E5%8A%A0%E9%80%9F%E4%B8%8B%E6%BB%91%2C%E8%AE%BE%E6%AD%A4%E8%BF%87%E7%A8%8B%E4%B8%AD%E6%96%9C%E5%8A%88%E5%8F%97%E5%88%B0%E5%9C%B0%E9%9D%A2%E7%9A%84%E6%91%A9%E6%93%A6%E5%8A%9B%E4%B8%BAFf%2C%E6%94%AF%E6%8C%81%E5%8A%9B%E4%B8%BAFN%2C%E6%B1%82Ff%E5%92%8CFN.+++%E8%BF%98%E6%98%AF%E8%BF%99%E9%81%93)
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