Determine the smallest couple moment that can be applied to the 150-lb wheel that will cause impending motion. The uniform concrete block has a weight of 300 lb. The coefficients of static friction are μ_A = 0.2, μ_B = 0.3, and between the concrete block and the floor, μ = 0.4.

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-1 ft- 5 ft M 1.5 ft A