2016年4月1日 星期五

Bungee Jumping -A Brief History of Bungee Jumping

A_Brief_History_of_Bungee_Jumping

Bungee jumping is an activity where a person jumps off of a high platform or place (several hundred feet in the air) with one end of an elastic rope attached to his her ankles or body.  

Bungee jumping (/ˈbʌndʒiː/; also spelt "Bungy" jumping, which is the usual spelling in New Zealand and several other countries)[1][2] is an activity that involves jumping from a tall structure while connected to a large elastic cord. The tall structure is usually a fixed object, such as a building, bridge or crane; but it is also possible to jump from a movable object, such as a hot-air-balloon or helicopter, that has the ability to hover above the ground. The thrill comes from the free-fallingand the rebound.[3] 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.

The other end of the rope 
is tied to the point where the participant would jump off the platform.  As 
the person starts his or her jump, the cord will stretch in order to take 
the energy of the fall.  The participant is pulled upward when the cord 
snaps back.  The jumper continues to bounce up and down until the energy 
from the jump is dissipated.


Bungee Jumping  -A Brief History of Bungee Jumping