(Answered) A motor spins a disk idisknbsp 251 kgm2 with a torque of 40

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A motor spins a disk (I_disk = 25.1 kg*m²) with a torque of 40 N*m, and a 18 N frictional force acts on the disk at a radius of 1.5 m. Attached to the disk at a radius of 2.6 m is a 17 kg mass. What is the magnitude of the angular acceleration in rad/s² of the system?

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