1. (Ignore air resistance) A rock is thrown 55% above the horizon at 30m/s. What is the horizontal displacement of the rock when it hits the ground? 2. Can only use vf^2=vi^2+2ad and sohcahtoa 3. Would it work to first draw a vector triangle and find the vertical velocity vector only. Then use vf^2=vi^2+2ad to find the displacement of the rock (vertically) by using vf=0 and vi as the vertical velocity calculated and -9.8 as acceleration. Then calculate horizontal displacement and multiply by 2? Thanks!