A lorry with a mass of $4000\,\text{kg}$ is moving at a speed of $4.0\,\text{m s}^{-1}$. A car has a mass of $1000\,\text{kg}$. Its kinetic energy is the same as the kinetic energy of the lorry. What is the speed of the car?
- A$2.0\,\text{m s}^{-1}$
- B$4.0\,\text{m s}^{-1}$
- C$8.0\,\text{m s}^{-1}$
- D$16.0\,\text{m s}^{-1}$