It's your birthday, and to celebrate you're going to make your first bungee jump. you stand on a bridge 110 m above a raging river and attach a 31-m-long bungee cord to your harness. a bungee cord, for practical purposes, is just a long spring, and this cord has a spring constant of 42 n/m. assume that your mass is 80 kg. after a long hesitation, you dive off the bridge. how far are you above the water when the cord reaches its maximum elongation?