# Damped pendulum equation

For the damped pendulum equation: x"+cx'+kx=0 assume k = 9.

(a) Write down a solution to the equation. When does the solution type change as c varies?

(b) Classify the equilibrium at the origin as a "sink", "source", "spiral sink", "spiral source", "center", or "saddle".

https://brainmass.com/math/calculus-and-analysis/damped-pendulum-equation-340643

#### Solution Summary

Damped pendulum equation is presented.

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