A rock on the surface of Mars is thrown straight upwards with an initial speed of $9.4\,\text{m s}^{-1}$. It reaches a maximum height of $12\,\text{m}$ above the surface. Assume that Mars has no atmosphere. What is the acceleration of free fall near the surface of Mars?
- A$0.39\,\text{m s}^{-2}$
- B$3.7\,\text{m s}^{-2}$
- C$7.4\,\text{m s}^{-2}$
- D$9.8\,\text{m s}^{-2}$