1. The problem statement, all variables and given/known data A 0.21 kg rock is projected from the edge of the top of a building with an initial velocity of 7.82 m/s at an angle 56 above the horizontal. Due to gravity, the rock strikes the ground at a horizontal distance of 10.5 m from the base of the building. How tall is the building? Assume the ground is level and that the side of the build- ing is vertical. The acceleration of gravity is 9.8 m/s2 . Answer in units of m. 2. Relevant equations Kinematics equations. Pythagorean Theorem: A +B = C 3. The attempt at a solution i tried to think about what I needed, and what equation would help me find it. In this case, the height h, I chose the following equation: H = Vy - VoY / 2A from the initial kinematics equation of Vy = Voy + 2AH From here, however, I am unsure how to determine Vy, which is the only variable I would need.