What is Bungee: Definition and 148 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. G

    Bungee Jumping: Unraveling the Physics Involved

    we've been studying te physics involved in bungee jumping. We went to a bungee site, and recorded data, such as length of rope, weight of jumper, distance to fall, etc. With the data we collected, I've been able to determine spring constant, equilibrium point, force exerted etc. But I've...
  2. S

    What is the 'spring' constant of a bungee cord?

    Homework Statement Consider a bungee cord of unstretched length L0 = 43 m. When the cord is stretched to L > L0 it behaves like a spring and its tension follows the Hooke’s law T = k(L − L0). But unlike a spring, the cord folds instead of becoming compressed when the distance between its...
  3. F

    Bungee Jumper Physics Lab Question

    Homework Statement Hi, So I have a final lab in my college physics class. And the lab procedure is as follows: Note: The measured mass of the Bungee jumper is 0.25837 kilograms (258.37 grams). I have attached my data as an Excel file: . My question is, what formula does k follow (it is most...
  4. 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...
  5. S

    Calculating Impulse on Bungee Jumper

    Homework Statement A 68.0 kg bungee jumper, tied to a 31.0 m long cord, leaps off a bridge whose deck is 61.0 m above the water. He falls to 7.0 m above the water before the bungee cord pulls him back up. What is the magnitude of the impulse exerted on the bungee jumper while the cord...
  6. J

    Bungee chord (standing waves and antinodes.)

    Homework Statement A 75 g bungee cord has an equilibrium length of 1.20 m. The cord is stretched to a length of 1.80 m, then vibrated at 20 Hz. This produces a standing wave with two antinodes. What is the spring constant of the bungee cord? Homework Equations f=nv/2L The...
  7. U

    What is the Bungee Jumper's Speed at a Height of 12.5 m Above the Water?

    Homework Statement "A bungee jumper of mass 64.5 kg ( including safety gear) is standing on a platform 48.0 m above a river. The length of the unstretched bungee cord is 10.1 m. The force constant of the cord is 65.5 N/m. The jumper falls from rest and just touches the water at a speed of...
  8. M

    Calculate Force Constant for Safe Bungee Jumping: F=700N, x=9m, k=77.77 N/m

    Bungee jumping- The unstretched length of the cord is 25.0m, the student weighs about 700N, and the balloon you start at is 36.0 m above the surface of the river below. Calculate the required force constant of the cord if the student is to stop safely 4.00m above the river. So would I want to...
  9. J

    Bungee Jumper/Oscillatory Motion

    Homework Statement A person named Larry is found dead, hanging at the 7-story level of a 15 story (45m) building. Larry has a mass of 90kg. When the bungee cord is cut, it has a relaxed length of 5 stories. Detective say he hit the ground while bungee jumping, you KNOW he was murdered. What is...
  10. 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...
  11. J

    Bungee Jumping (Finding distance and spring constant)

    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...
  12. 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...
  13. 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...
  14. 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...
  15. 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...
  16. 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
  17. S

    Vibrating a 75g Bungee Cord: Standing Wave Formation

    Homework Statement A 75 g bungee cord has an equilibrium length of 1.20 m. The cord is stretched to a length of 1.80 m, then vibrated at 20 Hz. This produces a standing wave with two antinodes. Homework Equations I really am not sure how to approach this using an equation, tried to use...
  18. C

    Bungee Jumping and Conservation of Energy

    [SOLVED] Bungee Jumping and Conservation of Energy Homework Statement A bored college student decides to try bungee jumping. He attaches an elastic bungee cord to his ankles and happily jumps off a tall bridge across a river. He ends up barely touching the water before the cord jerks him...
  19. C

    Conservation of Energy bungee jumping

    Homework Statement A bored college student decides to try bungee jumping. He attaches an elastic bungee cord to his ankles and happily jumps off a tall bridge across a river. He ends up barely touching the water before the cord jerks him back up The length of the relaxed cord is y_e; the...
  20. 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...
  21. W

    Proving 5G in G-Max Reverse Bungee in NZ & SG

    1. there is such a reverse bungee machine called the G-max Reverse Bungee in New Zealand and Singapore. Basically it works by attaching a car to two stretched giant rubber bands, then releasing them from the ground, so that it rockets up (to 60m), quite like reversed bungee jumping. it claims to...
  22. B

    Calculate Force Constant for Bungee Jumping

    Homework Statement so i have a bungee jumper starting 36m above the surface of a river from a hot air ballon. the elastic cord is attached to his waist. the unstretched length of the cord is 25m, and the student weighs 700N. calculate the required force constant of the cord if the student is...
  23. Y

    Harmonic Motion - Bungee Jumping

    Homework Statement You (mass m) are chosen as the "test pilot" for a new bungee jump. When you suspend yourself at rest from the bungee, you find that it stretches a distance L under your body weight. The jump point is a height 6L above the ground and the relaxed (unstretched length) of the...
  24. O

    Solving a Differential Equation for Bungee Jumping Motion

    Well as above I've completely hit a blank for some uni work I've got. If anyone could give me an idea of what i actually need to do here that would be great. I don't need someone do this for me. Just clear up what it is they want me to do. "...Bungee jumping situation Choose x= x(t)...
  25. L

    Bungee Jumping and Hooke's law. Is something missing?

    Ok, here is a physics problem that I cannot figure out for the life of me. I feel as though I can't solve it without knowing either the mass of the bungee jumper or the spring constant for the cord. Is there a way to get it somehow? Perhaps an important number is missing? I would appreciate any...
  26. G

    Find Out How High Bungee Jumper Rebound After First Jump

    i was wondering how you find out how high a bungee jumper will rebound back up after his first jump
  27. 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...
  28. 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...
  29. T

    What Is the Correct Velocity of a Bungee Jumper as the Cord Begins to Stretch?

    Lola goes bungee jumping. She leaps from a bridge that is 100 m above a river. Her bungee cord has an unstretched length of 50 m and a spring constant k=700N/m. lola has a mass of 45 kg. How fast is she falling when she just starts to stretch the cord? How long does it take for Lola to reach...
  30. D

    Medical Lemmings suicide or bungee gone wrong

    ok we all know about the little critters called lemmings who every now and then jump off cliffs in massive groups wipeing out lots of the lemming population each time they do it. but here's the question: is it really mass suicide or are they really stupid bungee jump enthusiasts who forget to...
  31. J

    How Is the Spring Constant Calculated for a Bungee Jump?

    From a test I had: A 700N bungee diver is released from a 40m bridge attached to a bungee cord which is 25m when unstretched. The cord obeys Hooke's Law. Find the spring constant of the cord if the diver is to stop 4m above the surface. What I did was say that gravity pulls this diver...
  32. P

    Calculating Impulse on Bungee Jumper from 78m Fall

    A bungee jumper (m = 75.00 kg) tied to a 48.00 m cord, leaps off a 78.00 m tall bridge. He falls to 8.00 m above the water before the bungee cord pulls him back up. What size impulse is exerted on the bungee jumper while the cord stretches? I found the velocity by v_final^2= V_inital + 2ad...
  33. J

    Bungee Jumping at 1,000 Feet: What Happens?

    You are in a hot air baloon at 1,000 feet altitude with you, a pilot and a bungee cord with one end attached to your leg and the other end attached to the basket of the balloon. You have found a point of absolute neutral bouyancy and there is no wind or any other change in the environment from...
  34. A

    Designing a Bungee Ride: Calculating Energy & Springs

    i realize that this is a common question, but i have a partner for this assignment and she's doing something different than me. i just want to make sure I'm not off base the assignment is to design a bungee ride. the problem involves someone being launched from 150 ft above the ground and...
  35. E

    How to find the Max. distance of the bungee jumper?

    Please help me to solve this question because I don't have a clue to do that! Q: In a bungee jump a volunteer of mass 70 kg drops from a bridge, tethered to his jump point by an elastic cable of unstretched length L = 20m and elastic modulus 3000 N. Ifnoring energy losses, and assuming he...
  36. E

    The max. distance of fall of the bungee jumper?

    Please help me to solve this question because I don't have a clue to do that! Q: In a bungee jump a volunteer of mass 70 kg drops from a bridge, tethered to his jump point by an elastic cable of unstretched length L = 20m and elastic modulus 3000 N. Ifnoring energy losses, and assuming he...
  37. P

    Calculate the spring constant of the bungee cord

    A bungee jumper with mass 200.0 kg jumps from a high bridge. After reaching his lowest point, he oscillates up and down, hitting a low point eight more times in 30 s. He finally comes to rest 20.0 m below the level of the bridge. Calculate the spring constant of the bungee cord and the...
  38. D

    Energy problem on bungee jumper

    I'm having trouble solving this problem. can n e one help me? A bungee jumper of mass 64.5 kg (including safety gear) is standing on a platform 48.0 m above a river. The length of the unstretched bungee cord is 10.1 m. The force constant of the cord is 65.5 N/m. The jumper falls from rest...
  39. J

    Conservation of mechanical energy of bungee jumper

    A 60kg bungee jumper jumps from a bridge. He is tied to a 12m-long bungee cord and falls a total of 31m a) calculate the spring constant of the bungee cord b) calculate the maximum acceleration experienced by the jumper okay I'm stuck on b) I got a0 calculated without any problems at all...
  40. C

    How Far Will a Bungee Cord Stretch During a Jump?

    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...
  41. 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...
  42. A

    Bungee Jumping Grav: Thanks for Your Support

    Grav. Thanks for all your help guys
  43. T

    The Physics Behind Bungee Jumping

    Hey, this is my first time on the forum and I have to do a project about bungee jumping. I need to talk about Hooke's Law, calculate The Conservation of Energy and the Conservation of Momentum... I know that F=k*x, but I am still a little unsure on how to relate it to bungee jumping...
  44. holly

    Impulse of bungee jumper slowing down

    Physics class is starting to sound like advertisements for toiletries: Men, try "Momentum!" Ladies, wear "Impulse" or "Joules," enriched with pheremones! Ha ha Having trouble with this problem, about a bungee jumper jumping off a cliff for 5 seconds total, in free fall for 3 seconds, then...
  45. 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...
  46. R

    What Length of Bungee Cord is Needed to Stop a 70 kg Person from Plunging 226m?

    Hi I'm having trouble with a certain question. Could someone please guide me to the right answer? Thanks "Consider a 70 kg person leaping off a 226m building. He plans to use a rope with force constant 4900 N/m. What length of rope does he need to stop his plunge 10m above the sidewalk? What...
  47. tandoorichicken

    Solve the Bungee Physics Problem: Net Force and Height Calculation"

    The problem is as follows: "Bungee Barbara jumps off a crane platform 30m above the ground. The bungee cord to which she is hooked has an unstretched length of 9.0m We assume the bungee cord behaves like an ideal spring with spring constant k=100 N/m. Barbara has a weight of 600 N. At what...
  48. 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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