Question

Urgent...
When an elastic material with Young's modulus Y is subjected to a stretching force X, the elastic energy stored per unit volume is
A) 2X/Y^2
B) Y^/2X
C) (X^2*Y)/2
D) X^2/2Y

Please let me know how you solved the questions amigos, gracias!

Answer 1

I thinking B) is the answer

Answer 2

Do you know the area ?