1. The problem statement, all variables and given/known data An 82 kg man drops from rest on a diving board 3m above the surface of the water and comes to rest 0.55 s after reaching the water. What force does the water exert on him? 2. Relevant equations F = mVf - mVi / t 3. The attempt at a solution I have no idea where to begin since I don't know the diver's velocity. Could I possibly use V = d/t? EDIT: Ok, so I used V = d/t and got 5.5 m/s for the velocity. Then I used F = mVf - mVi / t, and got 820 N. Is this correct?