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Compute an angular acceleration of the disk

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Q: A drum of 80-mm radius is attached to a disk of 160-mm radius. The disk and drum have a combined mass of 5 kg and combined radius of gyration of 120 mm. A cord is attached as shown and pulled with a force P of magnitude 20 N. Knowing that the coefficients of static and kinetic friction on are µs = 0.25 and µk = 0.20, respectively, determine

(a) Whether or not the disk slides,

(b) The angular acceleration of the disk and the acceleration of G.

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