A snooker ball has a mass of $200\,\text{g}$. It collides with the cushion on a snooker table and rebounds along its original line of motion. The ball reaches the cushion at $14.0\,\text{m s}^{-1}$ and then moves away at $7.0\,\text{m s}^{-1}$. The contact time between the ball and the cushion is $0.60\,\text{s}$. What is the average force exerted on the ball by the cushion?
- A$1.4\,\text{N}$
- B$2.3\,\text{N}$
- C$4.2\,\text{N}$
- D$7.0\,\text{N}$