The rectangular bar has a width of $w=2\mathrm{.}75in.$ and a thickness of $t=1\mathrm{.}25in.$ The normal stress on plane $AB$ of the rectangular block

shown is $6$ksi$(C)$ when the load $P$ is applied. Assume $a=4$ and $b=5.$

Determine

$($a$)$ the magnitude of load $P.$

$($b$)$ the shear stress on plane $AB.$

$($c$)$ the maximum normal and shear stresses in the block at any possible orientation.

Answers:

$($a$)P=$

kips

$($b$){}_{nt}=$

ksi

$($c$){}_{\text{m}\text{a}\text{x}}=$

ksi

${}_{\text{m}\text{a}\text{x}}=,$ksi