$-,A=4\mathrm{.}86E3m{m}^2$

$A_2=12\mathrm{.}28E3m{m}^2$

$E_1=E_2=200$MPa

For the truss shown above, determine:

a mathematical expression relating the tension in the cables $($T$1$ and T$2)$ to the applied force $P=2\mathrm{.}2E6N$ shown $($FBD useful here$)$

the displacement of joint $D$ when the load is applied $($t$1$ ry$)$

the stress in member BDetry$)$

the stress in member BD