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

A spring with a spring constant of 3200 N/m is initially stretched until the elastic potential energy is 1.44J. (U=0 for no stretch) What is the change in the elastic potential energy if the initial stretch is changed to

a) a stretch of 2.0 cm,

b) a compression of 2.0 cm,

c) a compression of 4.0 cm?

2. Relevant equations

U = 1/2kx^2

3. The attempt at a solution

u=(3200N/m(0.002m)^2)/2

u=0.64

correct answer = -.80

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# Potential energy of a string question

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