7.两条劲度系数均为k的轻弹簧连接后竖直悬挂在其中点和下 端同时挂上一个重g的小球则两弹簧的伸长之和为 A.2g/k B.g/k Template




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tomski7.两条劲度系数均为k的轻弹簧连接后竖直悬挂在其中点和下 端同时挂上一个重g的小球则两弹簧的伸长之和为 a.2g/k coloring