You throw a baseball at a 45° angle to the horizontal, aiming at a friend who's sitting in a tree a distance h above level ground. At the instant you throw your ball, your friend drops another ball. The two balls will collide, no matter what your ball's initial speed, provided it's greater than some minimum value. Find an expression for that minimum speed. Express your answer in terms of the variable h and appropriate constants. V= D V —| ΑΣΦ ?

You throw a baseball at a 45° angle to the horizontal, aiming at a friend who's sitting in a tree a distance h above level ground. At the instant you throw your ball, your friend drops another ball. The two balls will collide, no matter what your ball's initial speed, provided it's greater than some minimum value. Find an expression for that minimum speed. Express your answer in terms of the variable h and appropriate constants. V= D V —| ΑΣΦ ?