题目
如图所示,两个完全相同的小球A、B用等长的细线悬于O点.线长L.若将A由图示位置静止释放,则B球被碰后第一次速度为零时的高度可能是( ).【2.5】(A)L/2 (B)L/4(C)L/8 (D)L/10
答案：ABC
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