1. The problem statement, all variables and given/known data A ball is thrown upward at an angle of 30degrees to the horizontal and lands on the top edge of a building that is 20m away. The top edge is 5.0m above the throwing point. How fast was the ball thrown? 2. Relevant equations x=v0t+(1/2)at2 vf2=V02+2ax vx=v0cosθ vy=v0sinθ 3. The attempt at a solution I'm stumped on this question because I feel like I should solve for time first to get initial velocity but I can't figure out how to do that without actually having the initial velocity. I solved for t using t=20/v0cos30 and then plugged that into the vf2 equation but it comes out as a huge mess. I know the answer is 20m/s but I don't know how to get the answer. Thanks for any help!