The mass of the suspended object A is 4 kg. The mass of the pulley is 2 kg and its moment of inertia is 0.018 N-m2. The spring constant is k = 150 N/m. The spring is unstretched when x = 0. At t = 0, the system is released from rest with x = 0. What is the velocity of the object A at t = 1 s?
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