Bungee Jumping Simulation Lab

Some people jump off of high points attached to a giant rubber band.  Apparently they think this is fun.  While I don’t think I will ever try, there is some great physics we can analyze.

If you are not familiar with Bungee Jumping, see Wikipedia:

https://en.wikipedia.org/wiki/Bungee_jumping

In order to understand the physics we will start by analyzing the GIF below.  The Chrome Extension GIF Scrubber is necessary to answer the questions below.  A timing and measuring device can also be used.  You can assume that air resistance is negligible.

Question 1:  How far down are you when you feel the rope pulling?

Question 2:  At what point do you start to decelerate?

Question 3:  What would k for the cord have to be for you? 

Now, search for videos of Bungee jumping in New Zealand.  The link below is more visually appealing and shows more than simple bungee jumping.

https://www.youtube.com/watch?v=l9m4cW2yxy0

The company AJ Hackett operates the Kawarau Bridge Bungee in Queensland, New Zealand.  The bridge is 43 m above the river and you can choose to stay dry, touch the river or be fully dunked.

Question 4:  Using the K calculated above, what would the length of the cord have to be for you to touch the river?