For the disk of Prob. 18.97, determine (a) the couple M 1 j which should be applied to arm ABC to…

For the disk of Prob. 18.97, determine (a) the couple M1 j which should be applied to arm ABC to give it an angular acceleration  knowing that the disk rotates at the constant rate ω2 = 15 rad/s, (b) the force-couple system representing the dynamic reaction at A at that instant. Assume that ABC has a negligible mass.

Prob. 18.97 A thin disk of weight W = 10 lb rotates with an angular velocity ω2 with respect to arm ABC, which itself rotates with an angular velocity ω1 about the y axis. Knowing that ω1 = 5 rad/s and ω2 = 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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