The unbalanced wheel has a mass of 15 kg and rolls without slipping on the flat horizontal surface. The wheel has a radius of gyration about its mass center G of 64 mm, and its mass center is 40 mm from the center of the wheel. When the mass center G passes the horizontal line through O, the angular velocity of the wheel is 4 rad/s. For this instant, compute:
a. The angular acceleration of the wheel.
b. The normal force N and the friction force F acting on the wheel at its point of contact with the horizontal surface.
c. The minimum coefficient of friction for which the wheel does not slip.