A ball with mass $0.5\,\text{kg}$ strikes a vertical wall at a speed of $12\,\text{m s}^{-1}$. It then rebounds along the same line at a speed of $8\,\text{m s}^{-1}$. The impact takes $0.10\,\text{s}$. What is the average force on the ball due to the collision?
- A$0.2\,\text{N}$
- B$1\,\text{N}$
- C$20\,\text{N}$
- D$100\,\text{N}$