Math in Swimming

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http://www.merriam-webster.com/dictionary/drag
http://www.speedo.com/webapp/wcs/stores/servlet/FSContent_10151_10202_-1_//content/explorespeedo/aqualab/fastskinfsii.jsp
http://www.usaswimming.org/USASWeb/ViewMiscArticle.aspx?TabId59&AliasRainbow&Langen&mid43----
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How is math used in swimming?
One way math is used in swimming is calculating drag.
The definition of drag is
4 a: something that retards motion, action, or advancement b (1): the retarding force acting on a body (as an airplane) moving through a fluid (as air) parallel and opposite to the direction of motion

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The formula for drag in swimming is called drag at high velocity. the equation answers the force against an object moving through a fluid a somewhat high velocity.

There is also an equation for drag at low velocity. The name of the equation is Stoke's Drag.
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To find drag you need to find the velocity you swim at. The formula for velocity is velocitydistance/time (vd/t). So if you swam 50 yards in 27 seconds the quation would be v=50y/27s which means the velocity is 1.85 yards per second.
Find drag you also need to find the density of the water. Water density varies by temperature. Cold water has a higher density that hot water, but once the temperature goes down past 0, the density starts going up again.
Certain swimsuits can reduce drag. The speedo fastskin can reduce drag by up to 4%. That's another way math is used in swimming, percents.

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