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**1. Homework Statement**

If 6 J of work is needed to stretch a spring from 10 cm to 12 cm, and another 10 J is needed to stretch it from 10 to 12 cm, what is the natural length of the spring?

**2. Homework Equations**

W=FD

Hooke's Law

**3. The Attempt at a Solution**

Honestly, I stare at this problem and am at a loss as to where to start, and there are no examples in the book like this. Obviously I'm not asking for answers because I know the rules here, we're supposed to show effort; but if someone gave me some starting help it would be much appreciated.