A 37 gg ball is fired horizontally with initial speed v0v0 toward a 110 gg ball that is hanging motionless from a 1.1-mm-long string. The balls undergo a head-on, perfectly elastic collision, after which the 110 gg ball swings out to a maximum angle θmaxθmax = 52 ∘∘.
Part A
What was v0v0?