# Simple Pendulum / Rotational Kinematics

I was just wondering where this comes from. Our professor was giving a lesson on the simple pendulum in the lab class. I copied all of the equations and how he manipulated then I understood, except for this part. I forgot to ask after class, but if you can explain it or want more relative info, let me know. Thanks so much! =)

ω2=g/L

Where ω is the rotational velocity (or speed...I don't know which is the correct way to say this), g is the gravitational force and L is the length of the pendulum.

Thanks.

## Answers and Replies

Also g is the acceleration of free fall, not gravitational force.

Also g is the acceleration of free fall, not gravitational force.
Thanks! I forgot.

It's best to think of ω as the angular frequency of the motion. For a derivation, see this: http://hyperphysics.phy-astr.gsu.edu/HBASE/pend.html#c3"

Thanks! That helped.

I realise I should have put this in the homework help section...

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