A force of $0.80\,\text{N}$ stretches a spring to a length of $90\,\text{mm}$. The same spring has a length of $115\,\text{mm}$ when a force of $1.30\,\text{N}$ is applied. The spring obeys Hooke’s law. Determine the spring constant of the spring.
- A$8.9\,\text{N m}^{-1}$
- B$10\,\text{N m}^{-1}$
- C$11\,\text{N m}^{-1}$
- D$20\,\text{N m}^{-1}$