1. The problem statement, all variables and given/known data A launcher fires a ball that weighs 30kg straight up to a height of 300m. What is the maximum range of the ball could be fired at? 2. Relevant equations V^2 = V^2-2(a)(d) R = ( V02 Sin2θ ) / g 3. The attempt at a solution To find the maximum range i know that it has to be fired at a 45° angle. It is in our energy and momentum etc. unit, practice so im guessing equations relevant to that is what i must use. I used this equation to find the Velocity when fired straight up. Which i got 76.68 m/s. Which if i drew a triangle to show the projectory, would be my height. I then used 76.68SIN(45°) to get 54.22 m/s. Which is my x & y velocity. Then i used the range formula to get 300 m. Is anything wrong with my work, shouldnt it be a different answer than 300m.