I to solve a problem with bunjee jumping

  • Thread starter Thread starter trunks21
  • Start date Start date
Click For Summary

Homework Help Overview

The discussion revolves around a bungee jumping problem where the original poster seeks to determine the length of the bungee cord and the spring constant (K) for a jump of 150 feet, ensuring that the jumper avoids an obstacle that extends 15 feet below the jump point.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants discuss using conservation of energy principles to analyze the jump dynamics, questioning how to account for the rebound height while avoiding the obstacle. There are inquiries about the specifications of the bungee cord and how different lengths and masses might affect the outcome.

Discussion Status

The conversation is ongoing, with participants exploring various interpretations of the problem. Some have raised concerns about energy conservation and its implications on the rebound height, while others are seeking additional information about the bungee cord to further their analysis.

Contextual Notes

Participants note the challenge of ensuring that the jumper does not hit the obstacle while considering the energy dynamics involved in the jump. There is a lack of specific information regarding the bungee cord's properties, which is crucial for solving the problem.

trunks21
Messages
2
Reaction score
0
I need help to solve a problem with bunjee jumping!

I need to find the lengh and the K (spring constant) for a jump of 150ft. when they rebound they must avoid an obstacle that extends 15ft below the point at which they jump.

please help!
 
Physics news on Phys.org
trunks21 said:
I need to find the lengh and the K (spring constant) for a jump of 150ft. when they rebound they must avoid an obstacle that extends 15ft below the point at which they jump.

please help!
What have you done to try to solve the problem? What additional information do you have about the bungee cord?
 
We start to solve with the conservatiion of energy

1/2ks^2 + 1/2mV^2 + mgh = 1/2ks^2 + 1/2mV^2 + mgh

but with that we only have when the mass not hit the ground, the hard part is how with the same information the mass when rebound not hit the 15ft obstacle bellow the start point?

the information of the cord is what we need to find using different long cord and different mass...
 
trunks21 said:
We start to solve with the conservatiion of energy

1/2ks^2 + 1/2mV^2 + mgh = 1/2ks^2 + 1/2mV^2 + mgh

but with that we only have when the mass not hit the ground, the hard part is how with the same information the mass when rebound not hit the 15ft obstacle bellow the start point?

the information of the cord is what we need to find using different long cord and different mass...
The problem is that if energy is conserved you cannot avoid returning to the same height as you started. If the cord absorbs some energy (realistically it will) then you will return to a lower height. I don't know much about bungee cords. Do you have any specifications?
 

Similar threads

  • · Replies 24 ·
Replies
24
Views
3K
  • · Replies 6 ·
Replies
6
Views
2K
Replies
1
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 8 ·
Replies
8
Views
4K
  • · Replies 8 ·
Replies
8
Views
3K
  • · Replies 26 ·
Replies
26
Views
5K
  • · Replies 10 ·
Replies
10
Views
1K
Replies
5
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K