The double-collar bearing is subjected to an axial force P = 16 kN. Assuming that collar A supports 0.75P and collar B supports 0.25P, both with a uniform distribution of pressure, determine the smallest torque M that must be applied to overcome friction. Take μ_s = 0.2 for both collars.

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100 mm M B 50 mm 75 mm' 30 mm