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Can anyone explain this a little bit more?

I found these 2 formulas.

[tex]\tau=-k \theta[/tex]

How do I relate [tex]\theta[/tex] with m, R, r & k? (In my problem im not working with numbers, i need to find an expression for angular frequency in terms of R, r, m, k,

[tex]\tau=I \alpha[/tex] where [tex]I=MR^2[/tex]

therefore [tex]\alpha = \frac{-k_t\theta}{MR^2}[/tex]

Do I just resolve [tex]\theta[/tex] into its horizontal component? That wouldnt really get rid of [tex]\theta[/tex] though...Confused

Thanks

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# Rotational SHM

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