两个小球在光滑水平面上沿同一直线,同一方向运动,B球在前,A球在后,M A ="1kg," M B ="2kg," v A =6m/s, v B =2m/s, 当A球与B球发生碰撞后,A、B两球速度可能为 A. v A =5m/s, v B =2.5m/s B. v A =2m/s, v B =4m/s C . v A =" -4m/s," v B =7m/s D. v A =7m/s, v B =1.5m/s |
guangxi13 花朵
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