The circumference of the Earth at the equator is approximately $40,000 \mathrm{km}$, and the Earth completes one rotation every $24 \mathrm{hours}$. Therefore, if you were standing on the equator at point $P$, you will travel $40,000 \mathrm{km}$ in $24 \mathrm{hours}$, and your speed is about $1600 \mathrm{km}/\mathrm{hour}$! At a point $Q$ near the poles, the "circumference" of the Earth in that section is about $1600 \mathrm{km}$. What would be the speed of a person at $Q$?