The bar has cross-sectional area A = XXXXXXXXXXm 2 and is made of aluminum alloy with modulus of elasticity E = 80 GPa. It is subjected to 200-N axial loads as shown. (a) How much strain energy is...

The bar has cross-sectional area
A
= 0.0003 m²
and is made of aluminum alloy with modulus of elasticity
E
= 80 GPa. It is subjected to 200-N axial loads as shown. (a) How much strain energy is stored in the bar? (b) How much work is done on the bar by the 200-N loads?