Spring Constant and cord length? * Need explanation*

Click For Summary
SUMMARY

The discussion centers on calculating the necessary cord length for a bungee jump using a spring constant derived from a spring's behavior under a 200g weight. The unstretched length of the spring is 0.238m, and the stretched length with the weight is 0.305m, leading to a calculated spring constant of 29N/m. The user expresses confusion regarding the application of this constant to determine the appropriate cord length to prevent injury during a 10m drop. The conclusion emphasizes the need for a clearer understanding of how spring dynamics apply to bungee jumping.

PREREQUISITES
  • Understanding of Hooke's Law and spring constants
  • Basic physics of forces and motion
  • Knowledge of energy conservation principles
  • Familiarity with bungee jumping mechanics
NEXT STEPS
  • Research how to apply Hooke's Law to bungee jumping scenarios
  • Learn about energy conservation in free fall and elastic potential energy
  • Study the dynamics of spring systems under varying loads
  • Explore safety calculations for bungee jumping cord lengths
USEFUL FOR

Physics students, bungee jumping enthusiasts, and anyone interested in understanding the mechanics of spring systems and their applications in extreme sports.

Whitetiger101
Messages
4
Reaction score
0
Okay, so hi. I am brand new here at PF and I am signed up to ask this because this site appears to have allot of people who actually care and explain how to answer things.


I have a spring and a 200g weight.
- The unstretched spring is: 0.238m long
- Stretched spring (with 200g weight hanging from it): 0.305m long

I calculated the constant of the spring in Newtons per meter : 29N/m
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
We are suppose to drop "a jumper" a.k.a my 200g weight from a 10m drop.
My prblem is to find the length of string i need in order to have a successful bungee jump and not have a dead "jumper"
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
I don't 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.
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
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.)
 
Last edited:
Physics news on Phys.org
so sorry about posting this here. I read the homework rule after posting this.

Request delete.
 

Similar threads

High School Why is my experimental spring constant an order of magnitude off?
  • · Replies 4 ·
Replies
4
Views
2K
High School How will a spring stretch in the following cases?
  • · Replies 17 ·
Replies
17
Views
2K
Spring constant and length of string. *Need Explanation*
  • · Replies 2 ·
Replies
2
Views
7K
High School Why is Young's modulus constant below the limit of proportionality?
  • · Replies 23 ·
Replies
23
Views
5K
Graduate Length of a spring constantly accelerating through space?
  • · Replies 7 ·
Replies
7
Views
2K
High School What are the energy conservation principles at play in a catapult launch?
  • · Replies 3 ·
Replies
3
Views
2K
High School How to calculate the distance that a bungee will extend....
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Can Calculating a Horse's Leg Spring Constant Predict Jump Heights?
  • · Replies 5 ·
Replies
5
Views
3K
Undergrad How Does Hooke's Law Help Calculate Spring Length for Weight Drops?
  • · Replies 1 ·
Replies
1
Views
4K
High School Calculating the Spring Constant for Bungee Jumping
  • · Replies 8 ·
Replies
8
Views
3K