A car with mass $1800\,\text{kg}$ moves along a horizontal road, and its speed rises from $20\,\text{m s}^{-1}$ to $25\,\text{m s}^{-1}$ over a time of $5.4\,\text{s}$. What is the average useful power output of the car’s engine?
- A$4.2\,\text{kW}$
- B$38\,\text{kW}$
- C$120\,\text{kW}$
- D$1100\,\text{kW}$