$1-51$ For Problems $51$ and $52$ using the trusses shown in Figures P$1-51$ and P$1-52,$ compute the forces in all members and the stresses in the midsection, away from any joint. Refer to the Appendix for the cross$-$sectional area of the members indicated in the figures. Consider all join ${?}^{+c}+n$ he ninned $.$

Forces: $AD=CD=10\mathrm{.}5kN$

$AB=BC=9\mathrm{.}09kN$

Stresses: ${}_{AB}={}_{BC}=2\mathrm{.}3$MPa tension ${}_{BD}=17\mathrm{.}5$ MPa tension

${}_{AD}={}_{CD}=21\mathrm{.}0$MPa compression