1. The problem statement, all variables and given/known data A ball is dropped from rest from a height h above the ground. Another ball is thrown vertically upward from the ground at the instant the first ball is released. Determine the speed of the second ball if the two balls are to meet at a height h/2 above the ground. Variables for Ball 1 going downward v1i = initial velocity of ball1 v1f = final velocity of ball1 Variables for Ball 2 going downward v2i = initial velocity of ball2 v2f = final velocity of ball2 t = time taken for both the balls to travel common meeting point a = -9.8 m/s2 2. Relevant equations 4 general kinematic equations in one dimension having constant acceleration 3. The attempt at a solution Logically, the final velocity of ball 1, when it reaches h/2, must also be the value of the initial velocity of ball2 going upward. Also, ball2 final velocity at h/2 must be zero. In this way, both the balls can meet each other at h/2 I am still unable to arrive at the figure of initial speed of ball2.