A thin disk of weight W = 10 lb rotates with an angular velocity w2 with respect to arm ABC, which itself rotates with an angular velocity w1 about the y axis. Knowing that w1 = 5 rad/s and w2 = 15 rad/s and that both are constant; determine the force-couple system representing the dynamic reaction at the support at A.

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20₁ 18 in B -r=6 in. 9 in.