An Olympic athlete with a mass of $80\,\text{kg}$ is taking part in a $100\,\text{m}$ race. What is the most suitable estimate of his mean kinetic energy during the race?
- A$4 \times 10^{2}\,\text{J}$
- B$4 \times 10^{3}\,\text{J}$
- C$4 \times 10^{4}\,\text{J}$
- D$4 \times 10^{5}\,\text{J}$