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Simple harmonic motion for pendulum

I am doing M3 edexcel atm, I was wondering if there is way to prove that this motion is SHM. By proving, i mean form a equation in the form of acceleration = - omega square * x (just like what the textbook always would do)
Original post by Iconic_panda
I am doing M3 edexcel atm, I was wondering if there is way to prove that this motion is SHM. By proving, i mean form a equation in the form of acceleration = - omega square * x (just like what the textbook always would do)


There's quite a bit of info. on the 'net. Just google, SHM pendulum. However, you really need to have covered, very basic moments of inertia, and series expansion of the sine function.

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