$16\mathrm{.}5.$ Two $\frac{1}{4}-$in$.-$thick plywood sheets are joined by a $\frac{3}{8}-$in$.-$diameter bolt that transfers a shear force of $500lb.$ Assume that the allowable stress in bearing for the plywood is $400l\frac{b}{?}$ in$.{?}^2.$ Is the plywood overstressed in bearing?

Answer: $f_{bg}=5333l\frac{b}{?}$ in$.{?}^2$ plywood $($overstressed$)$