Lots + lots of people have asked me for bungee cords specs and I just got emailed this from J Kockelman (cheers!) Most Bungee Jumping Cord is made from "natural rubber" whose physical constants are in most college libraries. The most common bungee cords stretch 2 to 4 times the original length and the jumper feels 2.5 to 3.5 G's.
mgh = (1/2) k (h-L)2. The left hand side of the equation is the initial energy, Cosmo's gravitational potential energy. The right hand side of the equation is the final energy, the potential energy of the bungee cord when it is fully stretched. Gravitational potential energy has been converted into potential energy of the bungee cord.
Spend some quiet time visualizing yourself getting your equipment on and jumping and it going incredibly well. Visualize yourself feeling calm and enjoying it and with a smile on your face. I was never a big believer in visualization, but man it can really work. posted by bluedaisy at 10:13 AM on April 21, 2013. Air resistance, also known as drag, plays a significant role in the maximum extension of a bungee cord. As the jumper falls, air resistance increases and creates a force that opposes the motion. This force decreases the acceleration of the jumper and can also cause the bungee cord to reach its maximum extension sooner.
Eye Injuries. Eye injuries are commonly the result of bungee jumps because of the dangerously high increase in pressure that occurs in the eyes. When the elastic chord suddenly jerks you upward, it causes fluid to flow to your head, which results in very high blood pressure inside the blood vessels in your eyes.
Design a "bungee jump" apparatus for adults. A bungee jumper falls from a high platform with two elastic cords tied to the ankles. The jumper falls freely for a while, with the cords slack. Then the jumper falls an additional distance with the cords increasingly tense. 2jAem. 363 632 522 776 32 408 330 256

how does bungee jumping work