Problem $9\mathrm{.}10$: If the soil pressure under the footing were limited to $2\mathrm{.}5$ ksf $,$ what would be the new

required dimensions for the square footing? $($Use $2-in.$ increments.$)$

Problem: A tractor drawbar is connected to an implement as shown below. The tractor pulls with a force

of $50$ kN that must be transmitted by the shear bolt. Compute

a$.$ the shear stress in the bolt if the bolt diameter is $15$ mm $.$

b$.$ the tensile stress in the $5$ cm by $2$ cm drawbar.