physics help?

Question

A 50.0 kg diver steps off a diving board and drops straight down into the water. The net force when in the water is an upward 1350 N. If the diver comes to rest 4.8 m below the water's surface, what is the total distance between the diving board and the diver's stopping point underwater?

Answer 1

The work done by the water is 1350 N X 4.8 M. That is the amount of kinetic energy the diver had. Set that equal to the divers weight times the unknown distance.