I need it for a student project about modeling bungee jumping.I have modeled bungee but I need real data to test the model,and I couldn't find any yet.
134263
no, but if you have one i can tell you how to measure it
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You've come to the right place.  Check out this website, even if only to enjoy the animation.  \n\nhttp://www.shockabsorber.co.uk/bounceometer/shock.html\n\nalso, see this question\nhttp://answers.yahoo.com/question/index;_ylt=ArKJVUess49GdIPajkfefOLzy6IX?qid=1006031604148\n\nabout the same stuff.
538189
Try: http://www.phys.unsw.edu.au/~jw/HSCmotors.html
2621
here's a site with pics that might give you some ideas:\n\n\nhttp://www.physics.usyd.edu.au/competition/comp1998/comp98.html
593585
http://www.htmarket.com/gteecomp.html
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Some good examples are shown at http://www.cape.k12.mo.us/cjhs/science/strom/newton's_laws.htm.\n\nThe core of the problem is well described by:\n"Your vehicle must use Newton’s third law of motion to move forward; it must move forward by pushing backward on the floor, the air, or some other object."\n\nI frequently see the rule that electricity may not be used, though this seems to be inconsistent since electricity is just another form of stored energy and you still have to apply Newton's 3rd law to make your scooter move.\n\nAnyway, your problem is to store up sufficient energy somehow and then to release it in a controlled manner so that your scooter makes the 1.5M distance without crashing into the far side of the room. The simplest way to do this is through a spring of some kind. One good source for a spring would be a common mousetrap or rat trap. The mousetrap has a torsion spring that is loaded with energy when you set the trap and which suddenly releases it's energy when the trap is sprung. Some examples are shown at http://www.hypography.com/topics/mousetrapcar.cfm and http://www.docfizzix.com/how_work.htm (really good instruction site).\n\nAnother way to store energy in a spring is to blow up a balloon. The air inside the balloon is forced out and can propel a car. See http://www.balloonhq.com/balloon_car/balloon_car.html for some ideas.\n\nIn either case, you need to have some control over your energy release. With the mousetrap, the size of the axle and the wheels are important, as they determine the "gearing" of the energy transfer from the mousetrap to the floor. For the balloon, you'll want some way to experiment with different size nozzles to control how fast the air is released.\n\nYou can find wooden wheels at arts and crafts stores. You'll need something for an axle that turns smoothly or you'll lose all of your energy to friction.\n\nI'd go with the moustrap car shown on http://www.docfizzix.com/how_work.htm\n\nGood luck!
190756
I think I'm gonna look like I've got no clue whatsoever if I answer this one but, still, I'll give it a try risking my reputation. \n\nFirst of all, I didn't have a clue what you meant by a "buckyball", then I looked it up in a dictionary, now I know its a nickname for the C-60 Buckminsterfullerene. Thanks for adding one more word in my vocubulary (I desperately need a better vocubulary). \n\nNow, coming to your question, to determine the strengh of a rope made of C-60, umm.. I'll take a coward's way out by not going into the molecular constitution of the rope. As the physical strengh is an observable physical quantity, I'll solve the problem on a macroscopic scale. \nI'll hang a heavy mass with the help of the Carbon rope and will keep increasing the mass untill the rope ruptures.\nNow, I'll note down -\n1- The Weight (mass * acceleration due to gravity) that broke the rope.\n&\n2- The cross sectional area of the rope.\n\nNow, I'll just divide the Ultimate Weight by the cross sectional area of the rope to get the TENSILE STRENGTH of the rope.\n\nNow, I'll adopt the same procedure with the steel cable.\n\nI think, that way, we can easily compare the tensile strengths of the carbon & steel ropes.\n\nNow, to answer the second part, the density of the C-60 rope. Here too, I'll use a method that doesn't involve the molecular constitution of the rope (sorry again).-\nI'll use the Archimedes' Principle instead-\nLets first assign signs to the physical quantities-\nW = Weight of the Rope\nF = Buoyant force\nd1 = density of our rope\nd2 = density of the water (or the fluid in which you choose to immerse the rope)\nV1 = Volume of the rope\nV2 = Volume of water displaced by the rope.\ng = acceleration due to gravity\n\nTake the rope & put it into water (or any other fluid), now first see if it floats or gets submerged.\n\n\nIf it gets submerged, you can say that-\nW - F = (d1 - d2) * V1 * g \n(as the volume of the rope is equal to the volume of water displaced here)\nNow, knowing other quantites, we can calculate density of the rope!\n\nIf it floats-\nW = F\nd1 * V1 * g = d2 * V2 * g\n\nd1/d2 = V2/V1\n\nIf you take water as the fluid, d2 = 1000 kg/m^3
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http://www.geoblox.com/freemodels.htm\nScroll all the way down for a model of a Phoenician trireme.
621707
You could try this link.
673639
Try the link I'll provide below.
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E, G, J\n\nin this problem, it can be assumed that time of fall is of sec's only hence air resistance can be negligible. problem can be solved using hooke's law though i am not sure what principle bungee rope works. heant generation which will take place in rope will be much smaller then actual work done. There can't be a constant speed or accelaration coz both r changing constantly, for example to start of jump speed is zero, acc downwards, where as at bottom point speed is again zero but acc. is upwards. n in between speed is non zero. \nlast, u can treat him as a particle for simlification as long as u keep air resistance negligible. u must realize that neeta (coff. of air resistance is very small n play effective role at high speeds).\ncord applies different force at different moments becoz of hooke's law.\n\nI hope it helps......
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I certainly hope you have visited the link below for visual and mathematical insights into this problem.\n\nHowever, the only materials that come to mind which lend themselves to a physical model of this transformation are:\n\n o thin-but-rigid springs or "lead" wire(s) as supports/frames\n o plastic wrap as a surface substrate\n o flexible, rubberized, quick-drying paint as a protective layer\n\nI regret that my imagination is limited with respect to this problem, but good luck with your project!
162493
http://www.abu.org.my/public/compiled/p488.htm\nhttp://www.robofest.org.my/robofestintro.html
45103
Really professional modeling and graphic dispays of real weather is IDL. There is a student version.\nOne of the examples is the cross section of a thunderstorm. One could download information from the weather service and plot/model it on your computer. I have a little trouble learning it, but there are real rewards eventually. Also there is a site with a program for globes on icosahedrons using satelite data, Mars, Moon pictures and print out a globe.
315368
Try here:\n\nhttp://www.planetnautique.com/
315731
You can try http://www.vard.org/jour/02/39/3/sup/Herr.htm OR http://www.ai.mit.edu/projects/leglab/
473076
http://www.humankinetics.com/products/showproduct.cfm?isbn=0880116528