1. The problem statement, all variables and given/known data This question is something we got in our review booklet and I HATE projectile motion. An object is thrown horizontally with a velocity of 18 m/s from the top of a cliff. If the object hits the ground 100 m from the base of of the cliff, how high is the cliff? 2. Relevant equations d = v1t + 1/2at^2, v = d/t 3. The attempt at a solution I try to break it up into components(vertical and horizontal) but nothing seems to work. I used the equation d = 1/2v1 + 1/2at^2 to solve for t, because obviously the initial velocity is 0 m/s, but i end up with a far-fetched answer.