PLEASE ANSWER EACH

NUMBER IN SEPARATE

PAPER WITH COMPLETE

SOLUTION. INCLUDE ALSO

THE FREE BODY DIAGRAM.

The compound bar ABCD has a uniform cross$-$

sectional area of $0\mathrm{.}25i{n}^2.$ When the axial

force $P$ is applied, the length of the bar

is reduced by $0\mathrm{.}018$ in$.$ Determine the

magnitude of the force $P.$ The moduli of

elasticity are $29{10}^6$ psi for steel and

$10{10}^6$ psi for aluminum.

The timber member has a cross$-$sectional

area of $1750m{m}^2$ and its modulus of

elasticity is $12$GPa. Compute the change

in the total length of the member after

the loads shown are applied. Answer: $=$

$50mm$