1. The problem statement, all variables and given/known data At .5 of its maximum height, the speed of a projectile is .75 of its initial speed. What was its launch angle? 2. Relevant equations (1)V1y = V0y - gt (2)y1-y0 = V0yt - .5gt^2 3. The attempt at a solution The part that really bothers me is the second part of the first statement: "the speed of a projectile ..." What is the speed of a projectile? What do i denote that as? V?... So far I've gotten the following: initial velocity y-component: knowing: V1y = 0 (at max height) V1y = V0y - gt Voy = gt substitute V0y into equation (2) gives max height: y=.5gt^2 Any assistance would be most appreciated. Thanks!