Bicyclists in the Tour de France do enormous amounts of work duringa race. For e

Question

Bicyclists in the Tour de France do enormous amounts of work duringa race. For example, the average power per kilogram generated byLance Armstrong (m = 75.0 kg) is 6.50 W per kilogram ofhis body mass. (a) How much work does he do during a125 km race in which his average speed is10.0 m/s?
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(b) Often, the work done is expressed in nutritional Caloriesrather than in joules. Express the work done in part (a) in termsof nutritional Calories, noting that 1 joule = 2.389 X10-4 nutritional Calories.
nutritional Calories (a) How much work does he do during a125 km race in which his average speed is10.0 m/s?
J

(b) Often, the work done is expressed in nutritional Caloriesrather than in joules. Express the work done in part (a) in termsof nutritional Calories, noting that 1 joule = 2.389 X10-4 nutritional Calories.
nutritional Calories

Explanation / Answer

a.

Power=Force*velocity

The total power due to 75kg is

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