Physics – Popular Physics
Scientific paper
2005-05-17
Proceedings of the XXth Congress of the International Society of Biomechanics (2005)
Physics
Popular Physics
To appear in the Proceedings of the XXth Congress of the International Society of Biomechanics (August 2005)
Scientific paper
It is well known that ``equivalent'' sprint race times run with different accompanying wind speeds or at different altitudes are anything but equivalent races. The drag force acting on a sprinter is a function of air density and the relative wind speed, where the former has traditionally been calculated using the race venue's elevation above sea level. However, air density variation is dependent on more than just altitude. This work will quantify how changes in air temperature, barometric pressure, and humidity levels influence 100 m sprint performances. When these effects are considered in combination, the corrections to performances can be very large. The results suggest that a non-negligible difference in race times can be expected for ``equivalent'' performances run with the same wind speed at the same venue or physical altitude, but under different atmospheric conditions.
Mureika Jonas Roman
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