At the end of this section you should be able to:

1. Find moment about point in 2D using scalar method

2. Find moment about point in 3D using vector method

   • Properly create and expand cross product using determinate

3. Find moment about axis in 3D using vector method

4. Simplify pair of forces into couple in 2D and 3D

This section teaches how to compute moments in statics for 2D and 3D force systems. You will find the moment about a point in 2D using the scalar method, and find the moment about a point in 3D using the vector cross product, including correct determinant setup and expansion. You will also compute moment about an axis, reduce force pairs to equivalent couples in 2D and 3D, and replace a general loading with an equivalent force and couple system at a specified point. Mathematica resources are included for setup and checking.