The uniform concrete block in (Figure 1) has a weight of 300 lb. The coefficients of static friction are μA = 0.2, μB = 0.3, and between the concrete block and the floor, μ = 0.4. Figure 1 of 1 Part A Determine the smallest couple moment that can be applied to the 100−lb wheel that will cause impending motion. Express your answer to three significant figures and include the appropriate units. M =