The spring-held follower AB has a weight of 0.75 lb and moves back and forth as its end rolls on the contoured surface of the cam, where r = 0.2 ft and z = (0.1 sin 2θ) ft. If the cam is rotating at a constant rate of 6 rad/s, determine the force at the end A of the follower when θ = 45°. In this position the spring is compressed 0.4 ft. Neglect friction at the bearing C.

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