$31\mathrm{.}7($USCS units$)**$ Do

not

use

commas

in your

answer.$**$

A pneumatic torque wrench is

used to tighten $3/4-10$ UNC bolts in an automobile final assembly plant. A torque of $50$

$ft-lb$ is generated by the wrench. If the torque coefficient $=0\mathrm{.}20,$ determine the tensile

stress in the bolt.

$l\frac{b}{i}{n}^2$