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The 200 m free style women's swimming gold medal atSeol Olympic 1988 went to Heike Friendrich of EastGermany when she set a new Olympic record of 1 minuteand 57.56 seconds. Assume that she covered most of thedistance with a uniform speed and had to exert 460 Wto maintain her speed. Calculate the average force ofresistance offered by the water during the swim.

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