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Potential energy of pendulum in terms of displacement. 
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#1
Mar2813, 02:39 PM

P: 3

Hi guys, I'm having troubles finding how to write the potential energy of a 1D pendulum down. In terms of displacement however. This should be easy and it is, but my professor had this nice "clean" solution whereas mine is really dreadfull, any help? :)
edit: Ok nvm guys. I was thinking I went crazy for not finding it, since I almost have my physics license. But my professor used a Taylor approximation, nothing to worry about. 


#2
Mar2813, 02:56 PM

P: 3

By the way this is not homework, just a serious question to try to solve coupled harmonic oscillators :(



#3
Mar2813, 07:29 PM

HW Helper
P: 3,448

hi, turtle :) welcome to physicsforums
Do you still have a question about pendulums? I agree Taylor approximation is the way to go. (That's why they say 'for small angles'). Also, do you mean 2D pendulum. And what's a physics license?! 


#4
Mar2913, 04:56 PM

P: 3

Potential energy of pendulum in terms of displacement.
I meant a 1D pendulum in the sense that it only oscilates in one (!) direction. Of course this could represent a real 3D pendulum oscillating along just one axis.
Concerning the physics license, I didn't know how to sai it right, I meant physics degree or something like that. Lets just say I'm studying physics! This being the reason why I was so concerned not finding this "easy" solution :) Thx for offering help anyway! 


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