Answer to Question #72506 in Physics for Swize

Question

3.A ball is thrown upward from the top of a 50 m high building with an initial velocity of 20 m/s at the same instant , another ball is thrown upward with an initial velocity of 30 m/s from the ground. Determine
a) When and where they will meet each other
b) The velocity of each ball at that instant
Hint: s=y-yo
Note: Set the ground as a reference point for Ball A and Ball B. The final position of ball A is equal to the final position of ball B. Ya = Yb