1. The problem statement, all variables and given/known data The specialty wrench shown in the figure is designed for access to the hold-down bolt on certain automobile distributors. For the configuration shown where the wrench lies in a vertical plane and a horizontal 200-N force is applied at A, perpendicular to the handle, calculate the moment applied to the bolt at O. For what value of the distance d would the z-component of be zero? 2. Relevant equations M = r x F ; M= Fd 3. The attempt at a solution Well I succesfully calculated the moment around O as M=-48.6j -9.49k Nm but I failed to calculate the second part of the problem. It was asking for d in order to make Mz equal to zero. Using M=Fd I have: M=√My2+Mz2 = F d From that equation I have to find d in order to make Mz zero so I substitute Mz for zero and I calculate te value of d: √My2=Fd d=My/F=48.6/200=0.24 But the book gives a value of 74.5 mm, What am I doing wrong? Thanks!