1. The problem statement, all variables and given/known data A .550 kg projectile is launched from the edge of a cliff with an initial kinetic energy of 1550 J and at its highest point is 140 m above the launch point. a. What is the horizontal component of its velocity? b. What was the vertical component of its velocity just after launch? c. At one instant during its flight the vertical component of its velocity is found to be 65.0 m/s. At that time, how far is it above or below the launch point? 2. Relevant equations K=1/2mv^2 projectile motion equations 3. The attempt at a solution I used the kinetic energy equation to find an initial velocity of about 75 m/s. but now i'm not sure how to proceed...I feel like there are too many unknowns. My first approach was to try and figure out the measure of the angle of projection using various projectile motion equations knowing that the vertical component of velocity at it's highest point is zero, and that the y position is 140 m. but i kept coming up w/too many unknowns...i'm stumped! any help would be greatly appreciated.