Gear A has a mass of 1 kg and a radius of gyration of 30 mm; gear B has a mass of 4 kg and a radius of gyration of 75 mm; gear C has a mass of 9 kg and a radius of gyration of 100 mm. The system is at rest when a couple M₀ of constant magnitude 4 N·m is applied to gear C. Assuming that no slipping occurs between the gears, determine the number of revolutions required for disk A to reach an angular velocity of 300 rpm.

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A 50 mm arryrr -d 50 mm 100 mm Fig. P17.15 B Mo C www បណណលោកកណ្ត 150 mm