1. The problem statement, all variables and given/known data Nicole throws a ball straight up. Chad watches the ball from a window 6.10 m above the point where Nicole released it. The ball passes Chad on the way up, and it has a speed of 11.0 m/s as it passes him on the way back down. How fast did Nicole throw the ball? 2. Relevant equations x= x0 + v0t + 1/2 at^2 v= v0+at 3. The attempt at a solution I haven't the slightest clue as how to solve this. If she's tossing it upward, I know that would be a parabola graphically, so perhaps I need to use the quadratic equation at some point. Need to find acceleration, I suppose, to find how fast she threw the ball?