ASSIGNMENT

The truss shown in Figure $1$ is pin$-$supported at C and roller$-$supported at D$.$ A vertical load of $7$ kN is applied at joint A$.$ The cross$-$sectional area for all members is $446m{m}^2,$ and the modulus of elasticity is $200k\frac{N}{m}{m}^2.$

$($a$)$ Check the determinacy of the truss structure both internally and externally, and determine its degree of indeterminacy.

$(3$ marks$)$

$($b$)$ Using the virtual work method, determine the actual internal forces in all the truss members, considering member AC as redundant.

$(17$ marks$)$

Plz do hand writing