An aircraft begins from rest on a runway and reaches a take-off speed of $85\,\text{km h}^{-1}$ over a distance of at most $1.20\,\text{km}$. What minimum constant acceleration is required for the aircraft?
- A$0.23\,\text{m s}^{-2}$
- B$0.46\,\text{m s}^{-2}$
- C$3.0\,\text{m s}^{-2}$
- D$6.0\,\text{m s}^{-2}$