9.如图所示一轻弹簧上端悬于顶壁下端挂一物体在ab之间作简谐运动其中o点为它的平衡位置物体在a时弹簧处于自然状态若vxfa Template




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tomski9.如图所示一轻弹簧上端悬于顶壁下端挂一物体在ab之间作简谐运动其中o点为它的平衡位置物体在a时弹簧处于自然状态若vxfa coloring