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A drum of 4 -in. radius is attached to a disk of …

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A drum of 4 -in. radius is attached to a disk of 8 -in. radius. The disk and drum have a total weight of $10 \mathrm{lb}$ and a combined radius of gyration of 6 in. A cord is attached as shown and pulled with a force $\mathbf{P}$ of magnitude 5 lb. Knowing that the disk rolls without sliding, determine ( $a$ ) the angular acceleration of the disk and the acceleration of $G,(b)$ the minimum value of the coefficient of static friction compatible with this motion.

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Video Transcript

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