1. The problem statement, all variables and given/known data 79kg person jumps from a platform that is 100m above the water. He is attached by a bungee chord with sprint constant 40 N/m and length 35 m. Now he jumps off. How far is he above the water now when the chord has reached maximum elongation 2. Relevant equations F=ma, Ek= 1/2mv2 Ep=mgh...etc 3. The attempt at a solution I'm kind of stuck.. I know it involves energy, but the maximum elongation of the chord confuses me.