$--$Given Values$--$

Cylindrical Rod Material $=$ Nickel

Load $F-N(lbf)=6935(1559)$

Length, $l(mm)=342$

Diameter $(mm)=18\mathrm{.}8$

Elastic Reduction $({10}^{-3}(mm))=3\mathrm{.}9$

Original Diameter $(mm)=11\mathrm{.}0$

Original Gage Length $(mm)=48\mathrm{.}00$

Final Diameter $(mm)=7\mathrm{.}3$

Final Gage Length $(mm)=60\mathrm{.}66$

Yield Strength $(MPa)=507$

Elastic Modulus $(GPa)=249$

Problem $1$:

A cylindrical rod of the material listed above is to be subjected to the load $F,$ what must be the diameter to allow

an elongation of $.)$ if the rod is of the given length, $l?($Write your answer in mm $)$

Your Answer $=$

Incorrect.

Problem $2$:

A cylindrical bar of steel with the given diameter is to be deformed elastically by application of a force along the

bar axis. Determine the force that will produce an elastic reduction of the amount shown above in the diameter. $($

Write your answer in Newtons$)$

Your Answer $=$

Incorrect.