Engineering Mechanics Statics Jl Meriam 8th Edition Solutions -

$\mathbf{M}_A = \begin{vmatrix} \mathbf{i} & \mathbf{j} & \mathbf{k} \ 0.2 & 0.1 & 0 \ 100 & 0 & 0 \end{vmatrix} = 0 \mathbf{i} + 0 \mathbf{j} -10 \mathbf{k}$