1. The problem statement, all variables and given/known data A ball with a mass of 2.3 kg is thrown into the air. If the ball rises to a maximum height of 15 m before stopping and coming back down, how much kinetic energy did the ball have initially? 2. Relevant equations KE=0.5*mass*velocity^2 3. The attempt at a solution I don't think it's possible because no velocity is given and you can't find it because there is no time given. Am I missing something?