STRENGTH OF MATERIAL $($MECHANICAL ENGINEERING$)$

b$)$ A homogeneous $900$ kg bar AB is supported at either end by a cable as shown in Figure $1($b$).$ The diameter of the bronze and steel cables is $4$ mm and $3$ mm respectively.

i$)$ Calculate the normal stress in both cables.

ii$)$ Determine the normal strain in both cables if both cables stretch by $0\mathrm{.}32$ mm $.$

$(10$ marks$)$

$($PLEASE REFER TO THE FIGURE GIVEN TO DRAW A FREE BODY DIAGRAM AND LABEL IT$)$

PLEASE GIVE ME THE FORMULA THAT YOU USE AND SHOW THE INSERTION VALUE ON YOUR CALCULATION AND MAKESURE THE ANSWER YOU DO IS COREECT $.$THANKS