Under a small normal force, the surface frictional force is dominated by surface adhesion

that is influenced by the surface energy, which varies with the surface's crystallographic

orientation. For BCC crystals, what is the ratio of ${}_{\{001\}}^{SV}$ to ${}_{\{110\}}^{SV}?$ Indicate which of $\{001\}$ and

$\{110\}$ planes has a lower frictional force with brief explanation.