Consider the rod shown in $($Figure $1).$ The rod is made of a

material having an allowable normal stress of

${}_{\text{a}\text{l}\text{l}\text{o}\text{w}}=143$MPa and an allowable shear stress of

${}_{\text{a}\text{l}\text{l}\text{o}\text{w}}=50$MPa.

Determine the minimum diameter $d$ of the rod to safely support the

load.

Express your answer to three significant figures and include the

appropriate units.

$d=$

Figure