如右图所示,光滑水平面上小球A和B向同一方向运动,设向右为正方向,已知两小球的质量和运动速度分别为mA="3" kg、mB="2" kg和vA="4" m/s、vB="2" m/s。则两将发生碰撞,碰撞后两球的速度可能是 ( )
A.v′A ="3" m/s、v′ B =" 3.5" m/s | B.v′A ="3.2" m/s、v′ B =" 3.2" m/s |
C.v′A =-2 m/s、v′ B =" 11" m/s | D.v′A ="5" m/s、v′ B =" 0.5" m/s |