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Question

The 200 m free style women's swimming gold medal at Seol Olympic 1988 went to Heike Friendrich of East Germany when she set a new Olympic record of 1minute and 57.56 seconds. Assume that she covered most of the distance with a uniform speed. Calculate the average force of resistance offered by the water during the swim.


Solution

t=1 min 57.56 sec=117.56 sec.

p=460 W,s=200 m

p=Wt

Work W=pt=460×117.56 J

Again, W=FS

   F=WS

=460×117.56200

=270.3 N=270 N

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