轻质杠杆AB长0.6米,可以绕O点转动,AO=2OB,在杠杆的A端作用一个力F1(1)若F1为12牛,方向竖直向下,为使杠杆在水平位置平衡,作用在B端的力F2的最小值与方向(2)若将F1减小为9牛,作用点不改变,
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![轻质杠杆AB长0.6米,可以绕O点转动,AO=2OB,在杠杆的A端作用一个力F1(1)若F1为12牛,方向竖直向下,为使杠杆在水平位置平衡,作用在B端的力F2的最小值与方向(2)若将F1减小为9牛,作用点不改变,](/uploads/image/z/6695150-14-0.jpg?t=%E8%BD%BB%E8%B4%A8%E6%9D%A0%E6%9D%86AB%E9%95%BF0.6%E7%B1%B3%2C%E5%8F%AF%E4%BB%A5%E7%BB%95O%E7%82%B9%E8%BD%AC%E5%8A%A8%2CAO%3D2OB%2C%E5%9C%A8%E6%9D%A0%E6%9D%86%E7%9A%84A%E7%AB%AF%E4%BD%9C%E7%94%A8%E4%B8%80%E4%B8%AA%E5%8A%9BF1%EF%BC%881%EF%BC%89%E8%8B%A5F1%E4%B8%BA12%E7%89%9B%2C%E6%96%B9%E5%90%91%E7%AB%96%E7%9B%B4%E5%90%91%E4%B8%8B%2C%E4%B8%BA%E4%BD%BF%E6%9D%A0%E6%9D%86%E5%9C%A8%E6%B0%B4%E5%B9%B3%E4%BD%8D%E7%BD%AE%E5%B9%B3%E8%A1%A1%2C%E4%BD%9C%E7%94%A8%E5%9C%A8B%E7%AB%AF%E7%9A%84%E5%8A%9BF2%E7%9A%84%E6%9C%80%E5%B0%8F%E5%80%BC%E4%B8%8E%E6%96%B9%E5%90%91%EF%BC%882%EF%BC%89%E8%8B%A5%E5%B0%86F1%E5%87%8F%E5%B0%8F%E4%B8%BA9%E7%89%9B%2C%E4%BD%9C%E7%94%A8%E7%82%B9%E4%B8%8D%E6%94%B9%E5%8F%98%2C)
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