如图a所示一轻质弹簧的下端固定在水平面上上端放置一物体初始时物体处于静止状态.现用竖直�上的拉力f作用在物体上使物体开始�上做匀 Template




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tomski如图a所示一轻质弹簧的下端固定在水平面上上端放置一物体初始时物体处于静止状态.现用竖直�上的拉力f作用在物体上使物体开始�上做匀 coloring