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QUESTION
0g ball is fired horizontally with initial speed toward a 110 g ball that is hanging motionless from a 1.10 m-long string.
A 36.0g ball is fired horizontally with initial speed toward a 110 g ball that is hanging motionless from a 1.10 m-long string. The balls undergo a head-on, perfectly elastic collision, after which the 110 g ball swings out to a maximum angle = 52.0 degrees, what is the velocity
