No Limits

Bungee jumping is quite a dangerous sport and quite the adrenaline rush as well. You can jump from all kinds of places you just need to learn how to jump before you make your move. To make your jumps even more insane you can jump from moving bases like a helicopter, hot air balloon or something like that. There are no limits really when it comes to bungee jumping.

The word bungee came around in the 1930s but the first bungee jump didn’t happen until 1979. They used some kind of vine to do there bungee jumps with but I would figure that would hurt their feet as they fell and then were snapped back up that would sound like it would rip there ankles away from there legs. I don’t know how it is supposed to work but I guess it did.

Introduction
Recently a consultant of the Fair of Sciences sent me a message requesting the solution of a proposed subject, in college entrance exam, by FURG 2007. Here is the proposed subject:

“An adventurer plans to jump of the high of a bridge tied in an elastic (a radical sport known for ‘bungee jumping’) cable. The other extremity of the cable is tied in the bridge. In the beginning, the jumper’s movement is a free fall. Starting from the point in that the cable is stretched out, the jumper begins to slow down until a certain position, where it stops. Of this moment in before, the cable begins to pull the jumper upward. This position, where the jumper inverts the fall sense, it marks his/her largest vertical displacement D regarding the bridge. Naturally that the height of the bridge should be larger than D. it Considers a jumper’s of mass 80 kg hypothetical situation now using an elastic cable of 20 m of length. The elastic constant of the cable is 160 N/m. Calculate the value of D.
Observation: the mass of the cable can be despised in relation to the jumper’s mass. For acceleration of the gravity, use the value 10 m / s²:
The) 20 m.  B) 25 m.  C) 40 m.  D) 36 m.  And) 10 m.”

Bungee jumping is what is considered an extreme sport. It is basically jumping off a platform with an elastic cord tied to the jumper. As the cord is stretched resistance slows the person before they reach the ground. Energy stored in the cord is reduced incrementally as the jumper is oscillated by the rebounding properties of the cord until they come to a state of equilibrium.

Hooke’s Law of Elasticity

One of the most useful physics laws that can be used to explain bungee jumping is Hooke’s Law of Elasticity. Robert Hooke was a British physicist from Great Britain. He lived during the 17th century and created a law that explained the restoring force of a spring.

Hooke’s Law of Elasticity can be expressed as F = -kx. In this formula F represents the amount of force required to restore elastic material to its position of initial equilibrium, k represents the spring constant, which is a constant force and x represents the distance between the fully stretched spring to the initial position of equilibrium.

The first question that comes to mind for this particular extreme sport is, “Why.” Why would you jump off a perfectly good bridge? Or crane? Or why would you jump off a platform? Or hot air balloon? The question that follows closely behind in the observer’s mind goes something like this – “Is that a rubber band tied to their feet?” The answer to the first is simple: To fly, bounce and fly again. To we land based humans, the desire to soar through the air has been with us throughout history. Bungee jumping offers the sensation of flying from the initial free-fall to the repeated rebounds. And, the answer to the second question is, well, yes. It’s a rubber band!