A homogenous disc of radius r = 0.20m can oscillate as a physical pendulum around a horizontal acxis O located 0.10 m from teh center of the mass of the disc. The disc is perpendicular to O. Find the period of oscillations of the disc. And graivity is 9.8 m/s^2(adsbygoogle = window.adsbygoogle || []).push({});

Is this anything like a torisonal pendulum??

Parallel axis theorem would say that the moment of inertia of the disc would be [tex] I = \frac{1}{3} MR^2 + M (\frac{R}{2})^2 = \frac{7}{12} MR^2 [/tex] this is the inertia of the disc about this point O.

but what about the torque = I alpha = I (second deriavtive of angular displacement with respect to time)

please help...

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# Homework Help: Period of oscillations

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