A bungee cord is 30.0 m long and, when stretched a distance x , it exerts a rest
ID: 1323984 • Letter: A
Question
A bungee cord is 30.0 m long and, when stretched a distance x, it exerts a restoring force of magnitude kx. Your father-in-law (mass 100kg ) stands on a platform 45.0 mabove the ground, and one end of the cord is tied securely to his ankle and the other end to the platform. You have promised him that when he steps off the platform he will fall a maximum distance of only 41.0 m before the cord stops him. You had several bungee cords to select from, and you tested them by stretching them out, tying one end to a tree, and pulling on the other end with a force of 400N .
When you do this, what distance will the bungee cord that you should select have stretched?
Explanation / Answer
First assumption: all the cords are the same initial lenght (30m).
In essence, the problem is to figure out what rope you need. Given the conditions of the jump and the condition of the test of the cord.
All the cords follow the equation: F=kX. You have to select the rope you need, that is what
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