_ _ _ _ _ _ _ 7 Part A A 38.0 g ball is fired horizontally with initial speed an. toward a 110I g ball that is hanging motionless from 31.00 m Jung string. The halls undergo a head-on, perfectly elastic collision, after which the 11:} g ball swings out to a maximum angle 9mm = 52.0 \" Express your answer with the appropriate units. What was in]