The uniform $\backslash (12-\backslash$mathrm$\{$kg$\}\backslash )$ plate is welded to the vertical shaft, which is supported by bearings $\backslash ($ A $\backslash )$ and $\backslash ($ B $\backslash ).$ Calculate the magnitude of the force supported by bearing B during application of the $\backslash (150-\backslash$mathrm$\{$N$\}\backslash$cdot $\backslash$mathrm$\{$m$\}\backslash )$ couple to the shaft. The cable from $\backslash ($ C $\backslash )$ to $\backslash ($ D $\backslash )$ prevents the plate and shaft from turning and the weight of the assembly is carried entirely by bearing $\backslash ($ A $\backslash ).$

Answer: $\backslash ($ B$=\backslash )$ kN