Force-Temperature-Deformation Relationship  
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The figure shows an aluminum bar of dimensions 30 millimeters by 24 millimeters sandwiched between copper bars of dimensions 30 millimeters by 12 millimeters above and below it. The bars are held in place by pins on either end.

Write the force-temperature-deformation relationship for each bar.

For copper bars (1), the force-temperature-deformation relationship is:

and for aluminum bar (2):