A 75.0 kg stuntman is attached to a bungee cord. He jumps off a bridge that is over a river. When he finally stops, the bungee cord has stretched 28 m and he ends up 4 m above the water. Treat the stuntman as a point mass, and disregard the weight of the bungee cord. Assuming the spring constant of the bungee cord is 71.8 N/m, what is the total potential energy relative to the water when the man stops falling? 3,900 J
20,700 J
34,000 J
31,000 J