1. The problem statement, all variables and given/known data 200g weight spring unstretched length: 0.238m spring stretched( 200g hanging on spring): 0.305m Problem: Need to find length of a cord long enough so that the 200g weight can have the best bungee jump ever (barely not touching the floor which is 10m high) 2. Relevant equations K=mg/x 3. The attempt at a solution I calculated the constant of the spring in newtons per meter : 29N/m XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXX I dont get the constant, because the constant is just the length of the spring with the weight on it, and the spring stretches more then just 0.305m, speacialy if i drop it from 10m up. XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXX Please help me. **Conclusion** 29N/m is (to me) a useless value and have no idea on how to get the length of string so that my "jumper" does not die. Notes: i tried to make this as clear as possible. Why i need help: Because i would like to know how bungee jumping works. (presentation in english class, need to understand all of it and not just read stuff on google.) it is a demonstration so please help me i dont want to look like a fool infront of my class when my "jumper" hits the floor.