1. The problem statement, all variables and given/known data The data is taken from a graph. The initial velocity is 31m/s. I found the horizontal velocity to be 21m/s. The time the ball travels is 5 seconds. The total distance the ball travelled is 105m. The ball lands at the same vertical level at which it starts. Air resistance can be neglected. 2. Relevant equations Im pretty sure I have to use this equation, where t= 2.5. v = v(initial) + at I used the pythagoreum theorem to find the initial vertical velocity to be 22.8m/s. Then divided it by 2.5. What I came up with, -9.12, which is wrong. I just cant find the acceleration due to gravity. It looks straight forward but I am missing a step. Any ideas? Thanks!