-1/2(-9.81)*(x/(v*cos(30)))^2+v*sin(30)*x/(v*cos(30))+y1=0, x=16.5, v=6 solve for y1

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.