What is the Elastic Potential Energy Stored in a Compressed Spring?

kelly242
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Homework Statement



A force of 5.00 N compresses a spring 5.00 cm. What is the elastic potential energy stored in the compressed spring?

Homework Equations



Ep=1/2kx2

The Attempt at a Solution



Epelastic needs to calculated. I really do not know how to get there. K=f/x
k=5N/ 0.05m
100 N/m
the answer is actually 0.125 J
 
on Phys.org
So now you know k, and all that is left is...
 

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