The wheel has a mass of 100 kg and a radius of gyration of k_O = 0.2 m. A motor supplies a torque M = (40θ + 900) N · m, where θ is in radians, about the drive shaft at O. Determine the speed of the loading car, which has a mass of 300 kg, after it travels s = 4 m. Initially the car is at rest when s = 0 and θ = 0°. Neglect the mass of the attached cable and the mass of the car’s wheels.

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DITT 30° M 0.3 m