Consider the massless pulley connected by a spring at the pivot. What is the displacement x at equilibrium after the mass m has been added? Determine x in terms of m, g, and k.(adsbygoogle = window.adsbygoogle || []).push({});

I drew picture of the problem and tried to work it out in the pic below. The answer should be x = 4mg/k, but I dont understand how they got it. What am I doing wrong?

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# Simple Pulley Spring Problem

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