The velocity of the 8-kg cylinder is 0.3 m/s at a certain instant. What is its speed v after dropping an additional 1.5 m? The mass of the grooved drum is 12 kg, its centroidal radius of gyration is k̅ = 210 mm, and the radius of its groove is r_i = 200 mm. The frictional moment at O is a constant 3 N∙m.

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[m 12 kg |k = 210 mm r; = 200 mm T, = 300 mm 8 kg