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

A mass of 5 kilograms dangles from a spring, stretching the spring centimeters when in equilibrium.

The mass oscillates vertically in a fluid, with a frictional force times its speed.

If initially it starts from rest at an extension below the equilibrium point of centimeters, describe the subsequent motion, with a plot of the extension against time and with a phase space plot.

2. Relevant equations

I looked through my book, but my first problem is that I can't figure out if it is Simple Harmonic Motion, or Forced Harmonic Motion. I don't see any specific equations for this that involves all of the variables I have.

3. The attempt at a solution

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# Homework Help: Differential equations - harmonic motion

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