1. The problem statement, all variables and given/known data You throw a baseball at a 45 degrees angle to the horizontal, aiming at a friend who's sitting in a tree a distance, h, above ground. At the instant you throw your ball, your friend drops another ball. a) Show that the two balls will collide, no matter what your ball's initial speed, provided it's greater than some minimum value. b) Find an expression for that minimum speed. 3. The attempt at a solution Am I expected to provided an arbitrary initial velocity value and time, t at collision and use it to prove that the collision will occur?