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In the vise shown in the figure, the screw is single-threaded in the upper member; it passes through the lower member and is held by a frictionless washer. The pitch of the screw is 3 mm, its mean radius is 12 mm, and the coefficient of static friction is 0.15. Determine the magnitude P of the forces exerted by the jaws when M = 74-N·m couple is applied to the screw. The value of magnitude P is kN. Note: please show correct step by step working out!. And double check the final answer. Thanks.