把质量是0.2KG的小球放在竖立的弹簧上,并把球往下按至A的位置,如图甲所示.迅速松手后,弹簧把球弹起,球升至最高点(图丙),途中经过位置B时弹簧正好处于自由状态(图乙).已知B,A的高度
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![把质量是0.2KG的小球放在竖立的弹簧上,并把球往下按至A的位置,如图甲所示.迅速松手后,弹簧把球弹起,球升至最高点(图丙),途中经过位置B时弹簧正好处于自由状态(图乙).已知B,A的高度](/uploads/image/z/6656943-39-3.jpg?t=%E6%8A%8A%E8%B4%A8%E9%87%8F%E6%98%AF0.2KG%E7%9A%84%E5%B0%8F%E7%90%83%E6%94%BE%E5%9C%A8%E7%AB%96%E7%AB%8B%E7%9A%84%E5%BC%B9%E7%B0%A7%E4%B8%8A%2C%E5%B9%B6%E6%8A%8A%E7%90%83%E5%BE%80%E4%B8%8B%E6%8C%89%E8%87%B3A%E7%9A%84%E4%BD%8D%E7%BD%AE%2C%E5%A6%82%E5%9B%BE%E7%94%B2%E6%89%80%E7%A4%BA.%E8%BF%85%E9%80%9F%E6%9D%BE%E6%89%8B%E5%90%8E%2C%E5%BC%B9%E7%B0%A7%E6%8A%8A%E7%90%83%E5%BC%B9%E8%B5%B7%2C%E7%90%83%E5%8D%87%E8%87%B3%E6%9C%80%E9%AB%98%E7%82%B9%EF%BC%88%E5%9B%BE%E4%B8%99%EF%BC%89%2C%E9%80%94%E4%B8%AD%E7%BB%8F%E8%BF%87%E4%BD%8D%E7%BD%AEB%E6%97%B6%E5%BC%B9%E7%B0%A7%E6%AD%A3%E5%A5%BD%E5%A4%84%E4%BA%8E%E8%87%AA%E7%94%B1%E7%8A%B6%E6%80%81%EF%BC%88%E5%9B%BE%E4%B9%99%EF%BC%89.%E5%B7%B2%E7%9F%A5B%2CA%E7%9A%84%E9%AB%98%E5%BA%A6)
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