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.
Homework Statement
A bungee cord is 30.0 m long and, when stretched a distance x, it exerts a restoring force of magnitude kx. Your father-in-law (mass 95 kg) stands on a platform 45.0 m above the ground, and one end of the cord is tied securely to his ankle and the other end to the...
Homework Statement
You have persuaded your friend Astrid to attempt an illegal bungee jump from the New River Gorge Bridge. You will provide the bungee cord which has a total length of 40 m and a spring constant of k = 16 N/m. During the jump, Astrid will first fall freely for a distance equal...
Happy new year everyone, if I were to bungee jump off a building height H using a cord with an elasticity of 150 N/m 15 m long when it isn't stretched that is tied to a rope of length L (does not stretch), and I have a mass of M and the cord stretches X meters. Gravity is pulling at 10 m/s^2. I...
Homework Statement
Exercise 1. Two bungee jumpers jump from a bridge. Jumper A is fastened to a bungee cord and holding on to jumper B. The cord has a stiffness k = 80 lb/ft. Find the unstretched length of the cord if the two students just reach the surface of the water at the maximum...
Homework Statement
A person stands on a bridge that is 100 m above a river and attaches a 30-m-long bungee cord to his harness. A bungee cord, for practical purposes, is just a long spring, and this cord has a spring constant of 40 N/m. Assume that your mass is 80 kg. After a long hesitation...
Two men both weighing 150lb jump off a bridge using a bungee cord with stiffness k=80lb/ft. One of the men is attached to the cable and plans to release the other man when they reach the water 120ft below the bridge. Once there the connected man will let go of the unconnected man when they...
Good morning/evening fellow physics enthusiasts.
For my year 12 maths c class, we're doing an assignment on bungee Jumping (Task sheet can be found by googling "maths c bungee jumping" first link will be the relative one (pdf file)).
For this assignment, the first question asks you to find...
This was on a practice test for an upcoming exam.
You have persuaded your friend Astrid to attempt an illegal bungee jump from a Bridge. You will provide the bungee cord which has a total length of 40 m and a spring constant of k = 16 N/m. During the jump, Astrid will first fall freely for a...
I have a problem for an engineering class I am taking. It reads:
Derive an equation for k using the weight of a bungee jumper (170 lbs) the unstretched length of the cord (unknown) and the height of the dam from which the jumper is jumping off of (722 ft)
What I have come up with is...
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...
Homework Statement
A bungee jumper undergoes simple harmonic motion with amplitude 6.9 m and frequency 0.115 Hz. Assume the bungee jumper follows the simple harmonic motion equation x=A\cos (\omega t).
Find the velocity of the jumper at 0.25s
Homework Equations
x=Acos(\omega*t)...
Homework Statement
Bungee Jumping
l=natural length of rope
x=extension of rope
y=total distance fallen
m=mass,a=acceleration,v=velocity,g=acceleration due to gravity
k=air resistance co-efficient
Given data: The rope is stretched to twice its natural length by a mass of 75kg hanging at rest...
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...
Homework Statement
68kg bungee jumper standing on a 46m platform above the ground. The bungee cord has no effect for 9m(ie natural cord length is 9m)
when the bungee jumper is more than 9m away the spring constant is k=66N/m
a)what is his speed after falling 9m from the platform...
Homework Statement
In a "head dip" bungee jump from a bridge over a river the bungee cord is fastened to the jumper's ankles. The jumper than steps off and falls towards the river until the cord becomes taut. At that point, the cord begins to slow the jumper's decent, until his head just...
1. Properties of the ideal bungee rope tough? elastic? brittle? and how this could affect the physics of a bungee jump
2. elastic limit
3. Go on about this for 500 words for a full case study
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...
Conservation of Energy -- Bungee Jumping
Homework Statement
Unstretched length = 139 ft
k = 39 lb/ft
Weight of jumper = 122 lbs
Homework Equations
Assuming he hasn't hit the ground, how much has the bungee chord stretched when the professor is at the bottom of the jump? (ft)
The...
Homework Statement
A bungee jumper with a mass of 77.0kg, jumps from a high bridge. He just touches the water in the river below and after reaching this lowest point, he oscillates up and down, hitting the lowest point another 8 times in 48.0 seconds. Calculate the spring constant of the...
Homework Statement
A bungee jumper leaps from a bridge and undergoes a series of oscillations. Assume g=9.78 m/s^2. If a 58.0 kg bungee jumpers jumps from length of 20.0 m and she jumps from a heigh of 66.0 m above the river, coming to rest a few centimeters above the water surface on the...
Homework Statement
Most bungee cord problems have a massless cord. How would the equations in terms of force and energy be different if the cord has mass?
Homework Equations
Ee = 1/2 kx^2
Eg = mgh
Ek = 1/2 mv^2
Fe = -kx
The Attempt at a Solution
if the bungee cord has mass...
Homework Statement
Our lab was to predict the distance a bungee jumper will fall before coming to rest.
I already found the spring constant
When we have the spring constant we had to find the minimum safe drop height for a bungee jumper before being stopped by the spring. The following...
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...
Homework Statement
[PLAIN]http://img697.imageshack.us/img697/6702/bungee.png
Derive the equations of the motion for the jumper. Consider only the vertical motion of the jumper. (g = 9.81 m/s^2)
Homework Equations
Straing = (Stated Above)
Strain Rate = v / lo = v/25
F = -kx...
Homework Statement
The Royal Gorge bridge over the Arkansas River is 310 m above the river. A 60-kg bungee jumper has an elastic cord with an unstressed length of 50 m attached to her feet. Assume that, like an ideal spring, the cord is massless and provides a linear restoring force when...
Homework Statement
Note: A bungee cord can stretch, but it is
never compressed. When the distance be-
tween the two ends of the cord is less than
its unstretched length L0, the cord folds and
its tension is zero. For simplicity, neglect the
cord’s own weight and inertia as well as the...
Hi, the following questions are sort of both a physicy/mathsy questions however since I only do maths c (and have never done physics) any mathematical explanations would be greatly appreciated.
p.s. I came across this question on the internet and am quite interested in this kind of stuff...
Hi,
I was wondering whether there is a formula in terms of length and mass which would provide how far a person would fall is they were attached to a bungee cord rope which stretched to twice it's natural length when an object of 76 kilos was hung from it at REST from the free end?
I'm...
[b]1. I need to simulate a reverse bungee ejection seat (carnaval ride). This is a vehicle attached to two masts with bungee cords. I know the mass, air drag and acceleration (4.8 g). The first step is to calcutate the spring constants of the bungee cords and the damping constant (relative...
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...
Homework Statement
Hey, i need some help here
I'm trying to figure out the spring constant for bungee jump
Say, I'm 735N and the rope will apparently double in length when i jump off it.
I don't know the length of the rope thought.
but i do know it does have a spring constant.
we are...
Hey, i need some help here
I'm trying to figure out the spring constant for bungee jump
Say, I'm 735N and the rope will apparently double in length when i jump off it.
I don't know the length of the rope thought.
but i do know it does have a spring constant.
How to find out is the spring...
Homework Statement
Find how long of a cord needed to drop an egg from 14m to come within 5cm of the ground
We have determined a force deflection ratio for the cord given a .5m sample.
Homework Equations
what is x supposed to be here. Is it a number as I have or is it the mass or the...
I am a bit confused in this problem.
A person of mass 80 kg takes a bungee jump. At the lowest point of the jump the bungee cord is 90m in length and then at the lowest point of the next oscillation the cord has a length of 80m. when the person does eventually come to rest the length of the...
2. The equation you will be using is given by T = kx. Please refer to chapter 17 in the book for a reminder. I require you to design an experiment to calculate the stiffness constant k for the bungee rope I have given you. In the report you should consider the following points
a. What type...
Homework Statement
Bungee jumpers use an elastic rope to halt their fall when they are just a short distance from the ground. Using the idea of stored energy, explain whether heavy jumpers should use a shorter or longer length of rope than lighter jumpers.
Homework Equations
W=mg...
Homework Statement
A bungee jumper of mass m=70 kg is riding a bungee cord with spring constant k=50 N/m. Its unstretched length is L=9.0 m. What is the amplitude of the jumper's oscillation?
m=70 kg
k=50 N/m
L=9 mHomework Equations
mg(L+x)=(1/2)kx^2
x(t)=Bcos(omega(t)+alpha)
omega =...
A bungee jumper, whose mass is 87 kg, jumps from a tall platform. After reaching his lowest point, he continues to oscillate up and down, reaching the low point two more times in 8.5 s. Ignoring air resistance and assuming that the bungee cord is an ideal spring, determine its spring constant.
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...
Starting from rest, a 64.0 kg person bungee jumps from a tethered balloon h = 65.0 m above the ground. The bungee cord has negligible mass and unstretched length L = 27.1 m. One end is tied to the basket of the balloon and the other end to a harness around the person's body.
.(a) Express the...
Homework Statement
"A Daredevil plans to bungee-jump from a hot-air balloon 65.0 m above a carnival midway. He will use a uniform elastic cord, tied to a harness around his body, to stop his fall at a point 10.0 m above the ground. Model his body as a particle and the cord as having...
Homework Statement
For my Calc based Physics class we will be given an egg, a required height and a bungee cord (non-linear). We're to have already come up with a formula for this bungee cord to compute the required length so that we'll be able to drop the egg from the height and come as close...
Homework Statement
A bungee jumper has reached a point in her exciting plunge where the taut cord is 100 feet long with a 1/2 inch radius and stretching. She is still 80 feet above the ground and is now falling at 40 feet per second. You are observing her jump from a spot on the ground 60...
Homework Statement
A bungee jumper of mass m kg jumps from 20 meters. The bungie cord's spring constant is k N/m. Let y = 0 be the point where the bungee cord begins to become taught, and let y = 20 be the jump point.
It is known that the point of maximum acceleration is y = -17...
Homework Statement
Starting from rest, a 64.0 kg person bungee jumps from a tethered balloon 65.0 m above the ground. The bungee cord has negligible mass and unstretched length 25.8 m. One end is tied to the basket of the balloon and the other end to the person's body. The cord is modeled as a...
Homework Statement
A person weighing 55kg jumps off of a bridge with a bungee cord attached. The problem seeks to find the bungee cords Force vector when the acceleration is 7.8m/s2 in the downward direction.
m = 55kg
a1 = g = 9.8m/s2
To find:
F1 when a2 = 7.8m/s2 downward.
I've...
Bungee Jump--Springs and Energy
Homework Statement
A person bungee jumps off a bridge.
The person's mass is 90kg.
The height of the bridge above the water is 80m.
The bungee chord has a length of 25m.
The bungee chord's spring constant is 30 N/m.
What is the minimum distance the person...
Homework Statement
A bungee jumper jumps with a mass of 61kg jumps off of a bridge. The massless bungee cord is 25m long and beyond that length acts as a spring. The jumper reaches the lowest point 42.9m below the bridge. Find the force constant which characterizes the bungee cord. Homework...
Hi I am new to this forum I am currently doing year 11 physics at school nothing to complicated. now i have an assignment which i need to determine the length of the extension for a bungee and I am going to drop it from a certain height now i have the spring constant of my bungee and can figure...