## Question

###### The specialized plumbing wrench shown is used in confined areas (e.g.. under a basin or $\operatorname{sink}$ ). It consists essentially of a jaw $B C$ pinned at $B$ to a long rod. Knowing that the forces exerted on the nut are equivalent to a clockwise (when viewed from above) couple with a magnitude of 135 lb-in., determine ( $a$ ) the magnitude of the force exerted by pin $B$ on jaw $B C,(b)$ the couple $\mathbf{M}_{0}$ that is applied to the wrench.

The specialized plumbing wrench shown is used in confined areas (e.g.. under a basin or $\operatorname{sink}$ ). It consists essentially of a jaw $B C$ pinned at $B$ to a long rod. Knowing that the forces exerted on the nut are equivalent to a clockwise (when viewed from above) couple with a magnitude of 135 lb-in., determine ( $a$ ) the magnitude of the force exerted by pin $B$ on jaw $B C,(b)$ the couple $\mathbf{M}_{0}$ that is applied to the wrench.

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