A uniform metre rule weighing $2.0\,\text{N}$ is supported on a pivot at the $60\,\text{cm}$ mark. A weight of $4.0\,\text{N}$ is hung from one end, so the rule turns about the pivot. When the rule is level, what is the resultant turning moment about the pivot?
- Azero
- B$1.4\,\text{N m}$
- C$1.6\,\text{N m}$
- D$1.8\,\text{N m}$