A 65.1 kg person jumps from rest off a 3.04 m-high tower straight down into the water. Neglect air resistance during the descent. She comes to rest 1.11 m under the surface of the water. Determine the magnitude of the average force that the water exerts on the diver. This force is nonconservative. I've tried to solve the first part using that fact that the initial energy and the final one right before entering the water will be equal, then finding the final velocity and using this to find work and then force, but it doesn't work. I need some help.