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Homework Statement
http://img88.imageshack.us/img88/9351/springny2.jpg
[/URL]Homework Equations
[tex]E_p = \frac{Fx}{2}[/tex]
[tex]E_k = \frac{mv^2}{2}[/tex]
The Attempt at a Solution
http://img231.imageshack.us/img231/4773/worknd6.jpg
[/URL]I get 2.22 m/s, but the answer key says 3.1 m/s. Where did I go wrong?
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