1. The problem statement, all variables and given/known data a gold ball is hit with an initial velocity of 52m/s at an angle of 50 degrees How long is it in the air 2. Relevant equations Sin=opp/hyp Cos=adj/hyp D=vt+1/2at^2 3. The attempt at a solution First I split the vector into its vertical and horizontal components sin50=x/52 52sin50=x x=39.83m/s (up) cos50=x/52 52cos50=x x=33.4m/s (Horizontal) Then I use the kinematic equation to find the amount of time it is in the air considering its total vertical displacement will be 0 dv=v1*t+1/2a*t2 0=(39.83m/s)(t) + 1/2 (-9.8m/s2)t2 i then factor out "t" and this is where I'm having an issue. I get my equation to look like this 0=t(39.83m/s - 4.9m/s2 t) and the supposed answer is "0 or 8.1" however I'm unable to get this same result, I may be forgetting something so if anyone could explain how I get this number I'd greatly appreciate it.