(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A 70 kg bungee jumper jumps from a bridge. She is tied to a bungee cord whose unstretched length is 13 m , and falls a total of 37 m .

Calculate the spring stiffness constant of the bungee cord, assuming Hooke's law applies.

88 N/M

Calculate the maximum acceleration she experiences.

2. Relevant equations

Spring Force = -k * x

F = m * a

3. The attempt at a solution

Spring Force = (88 N/M)(24 m)

I used 24 m because that was the maximum stretch of the cord.

Spring Force = 2,112 N

a = F / m

a = (2112 N) / (70 kg)

a = 88 m/s^2

I added 9.8 m/s^2 because she was in free fall.

a = 97.8 m/s^2

Could someone explain why this is incorrect?

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# Homework Help: Conservation of Elastic and Gravitation Energy - 2

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