1. The problem statement, all variables and given/known data A spring is compressed a distance of 1m and a 2 kg rock is shot straight up with the spring. The rock attains a maximum height of 500m. What is the force constant k of the spring? Use g=10m/s^2 2. Relevant equations P.E.= mgh P.E. elastic= (1/2)(k)(x^2) 3. The attempt at a solution P.E.= mgh P.E.=(2000g)(10m/s^2)(500m) P.E.= 10000000 newtons P.E. elastic= (1/2)(k)(x^2) k= P.E elastic/ (1/2)(x^2) k= 10000000/ (1/2)(1) k=2000000 newtons ?