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

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

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

B) if half the energy is used in arm motion and half in leg motion, 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 the swimmers forward propulsion during an arm stroke comes from the hand pushing on the water and none from the arm, what is the average force of the hand on the water?

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

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

Solutions

Expert Solution

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

Here, we are given Metabolic Power as well as the energy consumed to swim which can be calculated with the given data.

genius_generous answered 1 week ago

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