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【单选题】
两个质量相等的小球由一轻弹簧相连接,再用一细绳悬挂于天花板上,处于静止状态,如图所示.将绳子剪断的瞬间,球 1 和球 2 的加速度分别为A.
a 1 ＝ g ， a 2 ＝ 0 ．
B.
a 1 ＝ 0 ， a 2 ＝ g ．
C.
a 1 ＝ g ， a 2 ＝ g
D.
a 1 ＝ 2 g ， a 2 ＝ 0 ．
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