A $6-$mm$-$thick rectangular alloy bar is subjected to a tensile load $P$ by pins at A and $B,$ as shown in the figure. The width of the bar is $w=$

$29$ mm $.$ Strain gages bonded to the specimen measure the following strains in the longitudinal $(x)$ and transverse $(y)$ directions: ${}_x=920$

$$ and ${}_y=-335.$

$($a$)$ Determine Poisson's ratio for this specimen.

$($b$)$ If the measured strains were produced by an axial load of $P=16kN,$ what is the modulus of elasticity for this specimen?

Answers:

$($a$)v=$

$($b$)E=$

GPa