The royal gorge bridge over the arkansas river is 310 m above the river. a 64-kg bungee jumper has an elastic cord with an unstressed length of 58 m attached to her feet. assume that, like an ideal spring, the cord is massless and provides a linear restoring force when stretched. the jumper leaps, and at at her lowest point she barely touches the water. after numerous ascents and descents, she comes to rest at a height h above the water. model the jumper as a point particle and assume that any effects of air resistance are negligible.