Question
Question: If S is the stress and Y is Young’s modulus of the material of a wire, the energy stored in the wire...
If S is the stress and Y is Young’s modulus of the material of a wire, the energy stored in the wire per unit volume is
A
2S2Y
B
S2/2Y
C
2Y/S2
D
S/2Y
Answer
S2/2Y
Explanation
Solution
u = 21stress × strain = 21 S(YS)=2YS2.