On Earth, a ball is released and, in a vacuum, it descends $2.0\,\text{m}$. When the ball is at $1.0\,\text{m}$, its acceleration is $10\,\text{m s}^{-2}$. Determine the acceleration of the ball at $0.5\,\text{m}$?
- A$5.0\,\text{m s}^{-2}$
- B$10\,\text{m s}^{-2}$
- C$15\,\text{m s}^{-2}$
- D$20\,\text{m s}^{-2}$