Situation $7$: $,$ A two $-$ member truss supports a load $W.$ The cross $-$ sectional areas of the members are $6,500m{m}^2$ for $AB$ and $3,200$

$m^2$ for $BC.$

Compute the stress in memueI MD$.$

Compute the stress in member BC$.$

Compute the maximum load $W$ that can be carried by the truss is the working stresses are $310$MPa for $AB$ and $840$MPa for

$BC.$

W$=2702$ kN