A wire extends by $8\,\text{mm}$ when a load of $60\,\text{N}$ is applied. A second wire, made from the same material, has half the diameter and one quarter of the original length of the first wire, and the same load is applied to it. Assuming that Hooke’s law is obeyed, what is the extension of this wire?
- A$1\,\text{mm}$
- B$4\,\text{mm}$
- C$8\,\text{mm}$
- D$16\,\text{mm}$