What is Bungee jump: Definition and 33 Discussions

Bungee jumping (), also spelt bungy jumping, is an activity that involves a person jumping from a great height while connected to a large elastic cord. The launching pad is usually erected on a tall structure such as a building or crane, a bridge across a deep ravine, or on a natural geographic feature such as a cliff. It is also possible to jump from a type of aircraft that has the ability to hover above the ground, such as a hot-air-balloon or helicopter. The thrill comes from the free-falling and the rebound. When the person jumps, the cord stretches and the jumper flies upwards again as the cord recoils, and continues to oscillate up and down until all the kinetic energy is dissipated.

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  1. DarkEnergy890

    Bungee jump | simple harmonic motion

    As you all know, a bungee jump is where a person is tied to a cord and the person jumps off and bounces up again. The natural length of a cord is 75 metres. Then when a person is attached onto the cord, the length becomes 83 metres when the person is at rest. I am sure that the person is not...
  2. J

    Bungee jumping dynamics assignment

    Homework Statement A formula has been determined: d=l+h+ (l(SRT(m(m+150))+m)/75), where d is the depth jumped to, l is the length of the rope, h is the height of the jumper and m is the mass of the person. The question is: At present, the model does not include air resistance. Show and discuss...
  3. Superman123

    How high will UT bounce on a bungee jump from the Golden Gate Bridge?

    1. Ut will bungee jump from the golden gate bridge. The height that she will jump from is 65 meters. The rope pulls her up 8 meters above the water. If UT's weight is 63 kg, how far will the rubber rope pull her upwards, if there's no loss to friction or air resistance? Homework Equations...
  4. S

    Who Hits the Water First? Investigating Free Fall Bungee Jump Physics

    Two girls are standing on a bridge over a river. One girl falls freely and the other ties a rope to her legs. Both jump at the same time from the bridge. The length of the rope is more than the vertical distance between the bridge and the river so that the rope never becomes taut till she...
  5. A

    Max speed and tension of bungee jump?

    Just signed up, hi everyone! 1. Homework Statement A man weighs 150 lb, and attaches a bungee cord having a stiffness of k = 500 lb/ft, to his feet. If he jumps from rest off the side of a bridge, determine the required unstretched length of the cord so that he can just touch the surface of...
  6. G

    How does mass of the bungee jumper effect a safe jump

    Homework Statement physics major practical, I was supposed to change the mass and find how it effects the safety of the jumper.But since hooks law doesn't follow bungee cord i really can't find a relationship.Homework EquationsThe Attempt at a Solution I used a bungee cord and hung different...
  7. G

    What Are the Physics Behind Bungee Jumping?

    hope to find few answers on physics on bungee jumping
  8. Z

    What Factors Affect the Impulse in a Bungee Jump?

    Homework Statement An small doll is attached to an elastic cord which is suspended from a support as shown. An accelerometer is attached to the doll. The doll is allowed to fall and produces the graph shown. When the recording system is started the doll is stationary at the upper support...
  9. Z

    Acceleration vs Time Bungee Graph

    Homework Statement https://bb9.waukesha.k12.wi.us/bbcswebdav/pid-692070-dt-content-rid-2436419_1/xid-2436419_1 The graph above was made from acelerometers placed on a person while experiencing a bungee jump. The graphed data is not smooth because it is real data. The positive direction is...
  10. W

    Bungee jump -> differential equation -> simulink simulation

    Hello guys, I found this forum using google because I need help with simulating bungee jump model. I've already done that with zero initial values and it looks good but I want it more realistic : Let's say L is the length of rope so elasticity force starts acting when y=L so logically time...
  11. M

    Bungee jump height/spring energy

    Homework Statement Imagine that you have been given the job of desiging a new bungee jumping platform. Customers of mass 53.0 kg will step off a platform, attached to a rope of unstretched length 52.6 m and spring constant 17.0 n/m. How far below the platform will the end of end of the rope...
  12. H

    Minimum Height Needed for Bungee Jump Problem

    this problem involves a man jumping off a bridge with a bungee chord holding him. he weighs 102 kg and the stretch constant of the chord is 167n/m. And there is a 12N air resistance. the length of the rope when slack is 20 ft what is the minimum height needed for him to do this? my attempt: i...
  13. T

    Bungee Jump: Conservation of Energy

    Homework Statement A bungee jumper of mass m drops o ff a bridge and falls vertically downwards. The bungee cord is elastic with natural length L and stiff ness k. Deduce that at the lowest point of the fall, the cord is stretched by an amount: x=mg/k(1+√(1+(2kl/mg)) Homework Equations...
  14. S

    Bungee Jump Physics: Solving for Maximum Fall Length and Spring Constant

    Ok so I'm trying to find the maximum length of fall before the bungee brings the jumper to a stop? So I've chosen a few arbitrary starting heights: 50m, 55m, 60m and a few arbitrary bungee spring constants: 25 N/m, 30 N/m, 35 N/m. How would I go about in approaching this problem? I think this...
  15. J

    Newton's Laws, bungee jump problem

    Please help me with this problem. many thanks :) A 55-kg bungee jumper has fallen far enough that her bungee cord is beginning to stretch and resist her downward motion. Find the force (magnitude and direction) exerted on her by the bungee cord at an instant when her downward acceleration has a...
  16. R

    Bungee Jumping: Min Spring Constant to Support Jorge (75kg)

    Homework Statement Jorge is going to bungee jumpy from a bridge that is 55.0m over the river below. The bungee cord has an unstretched length of 27.0m. To be safe, the bungee cord should stop Jorge's fall when he is at least 2.00 m above the river. If Jorge has a mass of 75.0kg what is the...
  17. G

    Bungee Jump: 65 kg, 11m Rope, 36m Fall

    The girl is going on a bungee jump. She weighs 65 kg. The rope is 11m. In total, she fell 36 m. The first 11 m is free fall, and another 25m is simple harmonic motion. 1) k of rope 2)max spped 3)what point when she has max speed 4)amplitude of rope 5)how long does it take Homework...
  18. C

    What is the Direction of Acceleration During a Bungee Jump?

    When a bungee jumper reaches the lowest point of their jump, is the direction of acceleration up or down? What about at the highest point?
  19. S

    Calculating Closest Bungee Jump Distance

    Homework Statement an 80Kg bungee jumper steps off the jump platform which is 50m above the ground. the bungee cord is 25m long when relaxed and has an E value of 8 MPa and a cross sectional area of 400mm^2. Calculate the closest the jumper gets to the ground. Consider the center of...
  20. Z

    Bungee Jump relating to force question

    Homework Statement A bungee cord is 30.0 {\rm m} long and, when stretched a distance x, it exerts a restoring force of magnitude kx. Your father-in-law (mass 100 kg) stands on a platform 45.0 {\rm m} above the ground, and one end of the cord is tied securely to his ankle and the other end to...
  21. A

    Solve Bungee Jump Issue: Derive Expression for x Double Dot, Show mg >= kh/4

    Homework Statement Typical bungee jumper. Rope has natural length h, spring constant k, man has mass m. The safety limit for the max acceleration of the man is 3g. Derive an expression for x double dot, and show mg *greater or same than* kh/4 Homework Equations Well I'm sure everyone...
  22. K

    What Are the Physics Behind Bungee Jumping?

    Hi everyone! I am recently doing an assignment for my broadening course. But I really don't know how to answer these questions as I only have basic knowledge for physics. Could anyone help me out? The questions are as follow: 1. Explain why iron chain is not used as bungee jump string instead...
  23. C

    Calculating the Maximum Displacement of Kate's Bungee Jump

    Homework Statement Kate, a bungee jumper, wants to jump off the edge of a bridge that spans a river below. Kate has a mass (m) , and the surface of the bridge is a height (h) above the water. The bungee cord, which has length (L) when unstretched, will first straighten and then stretch as Kate...
  24. R

    Kate's Bungee Jump: Calculating Distance Below Bridge

    Homework Statement Kate, a bungee jumper, wants to jump off the edge of a bridge that spans a river below. Kate has a mass m, and the surface of the bridge is a height h above the water. The bungee cord, which has length L when unstretched, will first straighten and then stretch as Kate falls...
  25. G

    Calculating the Final Height of Chris's Bungee Jump

    Homework Statement Chris jumps off a bridge with a bungee cord tied around his ankle. He falls for 15m before the bungee cord begins to stretch. Chris's mass is 75kg and we assume the cord obeys Hooke's law F = -kx, with k=50N/m. If we neglect air resistance estimate how far below the bridge...
  26. Y

    Bungee Jump Physics Problem: Solving for Velocity and Height

    https://www.physicsforums.com/images/icons/icon14https://www.physicsforums.com/images/icons/icon14.gif.gif
  27. K

    Bungee Jump - Potential and Kinetic Energy

    Homework Statement A bungee jumper needs to calculate how much bungee cord to attach to herself so that it will bring her to rest 3m above ground. The spring constant of the bungee cord is 22 N/m, and she has a mass of 55kg. Neglect the bungee cord's mass. a. How long a bungee cord is...
  28. D

    Solving Bungee Jump Problem with No Air Resistance or Damping

    a bungee jumper stnd on a bridge of 100m above the floor of a valley. She is attached to a bungee rope of length 25m and has a mass of 60kg. and i have taken g to be 10 Theres no: air resistance damping in the bungee rope and the weight of the bungee rope is...
  29. N

    How to maximize your height in a basketball jump shot?

    You go bungee jumping from a bridge that is 100m above a river, the bungee cord has an unstretched length of 50m and a spring constant of k=700 N/m You have a mass of 45kg. 1. How fast are you falling when you just start to stretch the cord and how long does it take to reach this point? 2...
  30. C

    Physics Bungee Jump Question

    I am stumped... very hard question: "A 70.0kg woman does a bungee jump. The length of the bungee cord is 5.00m and it has a spring constant of 122.08 N/m. Assume the gravitational field strength is 9.81 N/kg. a)What is the maximun distance the bungee cord will stretch and how far will the...
  31. A

    Finding the Right Parameters for a Safe 40m Bungee Jump

    Ok everyone I have a task for homework which asks me to: Determine the parameters for a rope suitable for you to use to make a safe 40m jump. At the moment, I'm unsure of the physics behind bungee jumping, but I know the parameters that I'd have to consider would be the length of the rope...
  32. J

    Bungee jump from a bridge, how to find h

    Hi guys, I'm new :smile: Now, I came here in search of help to a homework problem I have. I've tried to solve for around 40 minutes now, and can't get past solving for k. Here's the problem. The way I'm trying to solve is is by setting up two parts. One, I just solve for K in general...
  33. M

    Hooke's law with a bungee jump

    Hi my problem is that I have to model a bungee jump and enter it into a flowchart. I've worked out the free-fall part, but my problem is that the jumper has now reached the point where hookes law comes into play. The jumper mass is 90kg The unstretched length of the rope is 15m(of neglible...
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