A ball strikes a bat at a velocity of $30\,\text{m s}^{-1}$, then rebounds from the bat at a velocity of $20\,\text{m s}^{-1}$ in the opposite direction. The ball remains in contact with the bat for $0.10\,\text{s}$. Calculate the magnitude of the ball’s acceleration while it is in contact with the bat.
- A$1.0\,\text{m s}^{-2}$
- B$5.0\,\text{m s}^{-2}$
- C$100\,\text{m s}^{-2}$
- D$500\,\text{m s}^{-2}$