1. The problem statement, all variables and given/known data A ball is thrown straight up from the edge of the roof of a building. A second ball is dropped from the roof 1 second later. You may ignore air resistance If vo is greater than some value vmax, a value of h does not exist that allows both balls to hit the gorund at the same time. Solve for vmax. 2. Relevant equations y=yo+vo*t+1/2*a*t^(2) 3. The attempt at a solution I am not sure how to start it. Can somebody give me some hints?