Question 219: Properties of Matter

Question

If $$S$$ is stress and $$Y$$ is young's modulus of material of a wire, the energy stored in the wire per unit volume is

Accepted Answer

Energy stored per unit volume of wire,
$$E = {1 \over 2} 	imes \,stress\, 	imes \,strain$$
$$	herefore$$  $$E = {1 \over 2} 	imes \,stress\, 	imes \,{{stress} \over Y} = {1 \over 2}{{{S^2}} \over Y}$$
[ As Young's modulus(Y) = $${{Stress} \over {Strain}}$$
$$	herefore$$ Strain = $${{Stress} \over Y}$$ ]

Answer

$${{{S^2}} \over {2Y}}$$

Answer

$$2{S^2}Y$$

Answer

$${S \over {2Y}}$$

Answer

$${{2Y} \over {{S^2}}}$$

Properties of Matter

If $S is stress and Y$ is young's modulus of material of a wire, the energy stored in the wire per unit volume is

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