- #1

- 10

- 0

## Homework Statement

I need to come up with an equation that would model the motion of a non-linear pendulum with air resistance. [/B]

## Homework Equations

Fc=mgsintheta

Fdrag=

**(1/2)p(v^2)CA**

## The Attempt at a Solution

I started with mgsintheta-(1/2)p(v^2)CA=ma

After substituting v=r*omega and a=r*alpha, I get the following (look at the image)

However, after graphing, I do not get a damped oscillating curve, because of the v^2 not changing signs. Can someone guide me? See second image:

https://prnt.sc/i6bfv0