Problem: A boy stands on a bridge 17.1 m above the water, and he drops a water balloon on a boat of unsuspecting tourists. The boat is traveling at a constant speed of 11.3 m/s (toward the bridge), and the boy manages to hit a tourist on the boat with the balloon.
Part A: How far away from the base of the bridge was the boat when the boy released the balloon?
Please give me an explanation for this problem.