1. The problem statement, all variables and given/known data A .5kg apple is dropped off the top of a 15m tall building. Assuming there is no air resistance, what will the apple's speed immediately before it strikes ground be? 2. Relevant equations U=m g h 3. The attempt at a solution (.5kg)(9.8m/s^2)(15m) = 73.5 m/s? Just doesn't seem that simple, though.