Physics (AS & A Level) · Feb / March 2019 · Paper 12 · Question 19

A metal wire, fixed at one end, has length l and cross-sectional area A. The wire extends a distance e when mass m is hung from the other end of the wire. What is an expression for the Young Modulus E of the metal?

1. AE = \frac{ml}{Ae}
2. BE = \frac{mgl}{Ae}
3. CE = \frac{me}{Al}
4. DE = \frac{mge}{Al}

As printed in the paper