# Classical Mistake in K&K mechanics?

1. Feb 24, 2015

In the section on approximation methods, the formula for the period of a simple pendulum of length $L$ is given by:
$$T_0 = 2\pi \sqrt{\frac{g}{L}}$$
I am no expert on simple harmonic motion, but it is clear that the equation is dimensionally incorrect.
The problem is, the power series used is in accordance with the (possibly) faulty expression I wrote above. Thoughts?

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2. Feb 24, 2015

### sk1105

Yes I would say that is a mistake - the fraction is the wrong way up. I had a feeling it was, but I checked and Wikipedia agrees. Their equation is given with a citation, but if you prefer, I have found Hyperphysics a reliable source of help with physics problems, and it shares my view.