Question

A daredevil plans to bungee jump from a balloon 64.0 m above a carnival midway. He will use a uniform elastic cord, tied to a harness around his body, to stop his fall at a point 10.0 m above the ground. Model his body as a particle and the cord as having negligible mass and obeying Hooke's law. In a preliminary test, hanging at rest from a 5.00 m length of the cord, he finds that his body weight stretches it by 1.60 m. He will drop from rest at the point where the top end of a longer section of the cord is attached to the stationary balloon.

Answer 1

and the question is?

Answer 2

The question is : (a) what is the lenght of the cord he should use (b) what is the maximum acceleration he will experience