Ch 4. Moments/Equivalent Systems st Multimedia Engineering Statics Moment2-D Scalar Moment3-D Scalar Moment3-D Vector Couples and Equiv. System Distributed Loads, Intro
 Chapter 1. Basics 2. Vectors 3. Forces 4. Moments 5. Rigid Bodies 6. Structures 7. Centroids/Inertia 8. Internal Loads 9. Friction 10. Work & Energy Appendix Basic Math Units Sections Search eBooks Dynamics Statics Mechanics Fluids Thermodynamics Math Author(s): Kurt Gramoll ©Kurt Gramoll

 STATICS - CASE STUDY Introduction Problem Description Click to view movie (110k) In the previous section, the moment generated by a wrench as analyzed. However, it was determined that the moment changed as the wrench was rotated around the pipe. It is possible that the magnitude of the moment will increase even though the magnitude of the force remains constant. What is known: The wrench rotates from α = 0° to α = 90°. The force is applied at point Q. The necessary dimensions are given. Questions Known information What is the maximum moment generated at joint B as the wrench rotates from α = 0° to α = 90°? Approach Determine the position vector from joint B to point Q for any angle α. Determine the Cartesian components of F as a function of the angle α. Solve for the moment of F at joint B using the vector description of moment.