A ball moves down a curved track, as illustrated. Point X is $0.40\,\text{m}$ higher than point Y. At point X, the ball’s speed is $2.5\,\text{m s}^{-1}$. Frictional forces may be ignored. What is the speed of the ball at point Y?
- A$2.8\,\text{m s}^{-1}$
- B$3.2\,\text{m s}^{-1}$
- C$3.8\,\text{m s}^{-1}$
- D$14\,\text{m s}^{-1}$