The prismatic bar is made of material with modulus of elasticity E = 28E6 psi and coefficient of thermal expansion α = 8E‐6 o F -1 . It is fixed to a rigid wall at the left. There is a gap b = 0.002...

The prismatic bar is made of material with modulus of elasticity
E
= 28E6 psi and coefficient of thermal expansion
α
= 8E‐6
^oF^-1. It is fixed to a rigid wall at the left. There is a gap
b
= 0.002 in between the bar’s right end and the rigid wall. If the temperature is increased by 50
^oF above the bar’s initial temperature
T, what is the normal stress on a plane perpendicular to the bar’s axis?