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championship swimmers take about 22 seconds and about 30 arm strokes to move through the water...

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Physics

championship swimmers take about 22 seconds and about 30 armstrokes to move through the water in a 50 meter freestyle race.

A) A swimmers metabolic power is 800 W. if the efficiency forswimming is 25%, how much energy is expended moving through thewater in a 50 m race?

B) if half the energy is used in arm motion and half in legmotion, what is the energy expenditure per arm stroke?

C) Model the swimmers hand as a paddle. During one arm stroke,the paddle moves halfway around a 90 cm radius circle. If all theswimmers forward propulsion during an arm stroke comes from thehand pushing on the water and none from the arm, what is theaverage force of the hand on the water?

D) How much cal should the swimmer consume from food for such arace?

E) How much energy would be lost in form of thermal energy?

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championship swimmers take about 22 seconds and    See Answer
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