1. The problem statement, all variables and given/known data A first stone is dropped from the roof of a building. 2.40 s after that, a second stone is thrown straight down with an initial speed of 33.0 m/s, and it is observed that the two stones land at the same time. (a) How long did it take the first stone to reach the ground? _____________ s (b) How high is the building? _____________ m (c) What are the speeds of the two stones just before they hit the ground? _____________ m/s (first stone) _____________ m/s (second stone) 2. Relevant equations Free Fall Equations: Vf = g*t d= .5*g*t^2 and Kinematic Equations 3. The attempt at a solution If I knew any variables, I might be able to use the Free Fall Equations, but no variables are given for the first stone. The second stone only tells me Vi and a little bit of information about t..but not enough to get me started really. I'm truly lost on this one. I'm sorry my attempt at a solution seems pethedic!