1. The problem statement, all variables and given/known data Standing on the top ledge of a 55 meter high building you throw a ball straight up with an initial speed of 35 m/s. How long, to the nearest second, does it take to hit the ground? 2. Relevant equations v= at + vo 3. The attempt at a solution i think im using the wrong equation... X= 55 V= 35 a=9.8 t=?