The motor M is used to hoist the 12,000-lb stadium panel (centroidal radius of gyration k̅ = 6.5 ft) into position by pivoting the panel about its corner A. If the motor is capable of producing 5000 lb-ft of torque, what pulley diameter d will give the panel an initial counterclockwise angular acceleration of 1.5 deg /sec²? Neglect all friction.

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15° 10' M 20' AT