A squarebar of size $$10mm \times 10 mm$$ and length 1000 mmis subjected to 200 N axialtensile force. The bar is made of mild steel having modulusofelasticity of 200 GPa. Find the strain energy density stored in the bar underthis state of loading?

A

10 $$\frac{J}{M^{3}}$$

B

20 $$\frac{J}{M^{3}}$$

C

2 $$\frac{J}{M^{3}}$$

D

5 $$\frac{J}{M^{3}}$$