Ok I've figured the velocity of the first ball to be -25.7 m/s as it strikes the ground and i understand that the total displacement for each ball as it hits the ground is -23.5 m but I still cannot quite figure out the velocity of the second ball as it hits the ground..
Homework Statement
Two students are on a balcony 23.5 m above the street. One student throws a ball, b1, vertically downward at 14.1 m/s. At the same instant, the other student throws a ball, b2, vertically upward at the same speed. The second ball just misses the balcony on the way down...