如图,物体B经一轻质弹簧与下方地面上的物体A相连,A、B都处于静止状态.用力把B往下压到某一位置,释放后,它恰好能使A离开地面但不继续上升.如果仅改变A或B的质量,再用力把B往下压到同一位
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![如图,物体B经一轻质弹簧与下方地面上的物体A相连,A、B都处于静止状态.用力把B往下压到某一位置,释放后,它恰好能使A离开地面但不继续上升.如果仅改变A或B的质量,再用力把B往下压到同一位](/uploads/image/z/4653013-13-3.jpg?t=%E5%A6%82%E5%9B%BE%2C%E7%89%A9%E4%BD%93B%E7%BB%8F%E4%B8%80%E8%BD%BB%E8%B4%A8%E5%BC%B9%E7%B0%A7%E4%B8%8E%E4%B8%8B%E6%96%B9%E5%9C%B0%E9%9D%A2%E4%B8%8A%E7%9A%84%E7%89%A9%E4%BD%93A%E7%9B%B8%E8%BF%9E%2CA%E3%80%81B%E9%83%BD%E5%A4%84%E4%BA%8E%E9%9D%99%E6%AD%A2%E7%8A%B6%E6%80%81.%E7%94%A8%E5%8A%9B%E6%8A%8AB%E5%BE%80%E4%B8%8B%E5%8E%8B%E5%88%B0%E6%9F%90%E4%B8%80%E4%BD%8D%E7%BD%AE%2C%E9%87%8A%E6%94%BE%E5%90%8E%2C%E5%AE%83%E6%81%B0%E5%A5%BD%E8%83%BD%E4%BD%BFA%E7%A6%BB%E5%BC%80%E5%9C%B0%E9%9D%A2%E4%BD%86%E4%B8%8D%E7%BB%A7%E7%BB%AD%E4%B8%8A%E5%8D%87.%E5%A6%82%E6%9E%9C%E4%BB%85%E6%94%B9%E5%8F%98A%E6%88%96B%E7%9A%84%E8%B4%A8%E9%87%8F%2C%E5%86%8D%E7%94%A8%E5%8A%9B%E6%8A%8AB%E5%BE%80%E4%B8%8B%E5%8E%8B%E5%88%B0%E5%90%8C%E4%B8%80%E4%BD%8D)
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