$2\mathrm{.}23$ The bar in Fig. $($a$)$ is subjected to a downward force $F=8kN.$ Figure $($b$)$ shows

two views of the pin support at $A.$ The support has a pin $40$ mm in diameter.

What is the magnitude of the average shear stress in the pin?

$($a$)$

$($b$)$

Problem $2\mathrm{.}23$