# General Physics Short question [closed]

Does any one know where this formula come from ?

$\alpha (t) = -\omega^2\ \Theta(t)$

Thanks

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## closed as too localized by David Z♦Dec 18 '12 at 9:36

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It looks like the formula relating the angular acceleration $\alpha$ and the angular displacement $\theta$. The $\omega$ is the angular frequency and this equation is the same as the simple harmonic oscillator. You can think of a spinning wheel rotating back and fro forever.