Consider the test bar shown. On application of an applied force P of 1.5kN, a strain guage positioned within the test length illustrates the value of $$ \epsilon_y $$, which is recorded as 7E-4.
The cross section area of the test length is such that b is 23 mm and d is 48 mm. The value of E is 1.35 GPa.
P
A
B
P
d
y
x
test length
cross section
b
Using the information presented, determine the value of v, the Poisson's ratio.
Present your answer to 3 significant figures, presenting a negative value when the lateral strain denotes a decrease in lateral dimensions.
Number