如图1所示轻弹簧下端固定在水平面上一个小球从弹簧正上方某一高度处由静止开始自由下落接触弹簧后把弹簧压缩到一定程度后停止下落在小球下落的 Template




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tomski如图1所示轻弹簧下端固定在水平面上一个小球从弹簧正上方某一高度处由静止开始自由下落接触弹簧后把弹簧压缩到一定程度后停止下落在小球下落的 coloring