oduced by a force, or forces, about a specified point on a ember.

he moment of a force $F$ about the moment axis passing rough O and perpendicular to the plane containing O and $F$ ian be expressed using the vector cross product, $M_O=rF.$ n a properly constructed Cartesian coordinate system, the vector cross product can be calculated using a matrix determinant: $$

$M=rF=|[i,j,k],[r_x,r_y,r_z],[F_x,F_y,F_z]|$

Notice that the order of the elements of the matrix determinant is important; switching rows $2$ and $3$ of the determinant would change the sign of the moment from positive to negative $($or vice versa.$)$

Figure

$1$ of $3$