(a)[1]
State the definition of Young modulus.
(b(i))[3]
Calculate the wire’s cross-sectional area.
(b(ii))[3]
The wire starts with an extension of $2.0 \times 10^{-3}\ \text{m}$. Find the work done in increasing the extension of the wire to $3.0 \times 10^{-3}\,\text{m}$.
(ii)[3]
The wire begins with an extension of $2.0 \times 10^{-3}\,\text{m}$. Calculate the work done when its extension is raised to $3.0 \times 10^{-3}\,\text{m}$.