The recommended daily intake for the average person is about 2200 calories. In 2014, the average American consumed about 3800 calories daily(a) With what average power would the average American have to work with in order to consume excess-daily calories? Consider 1 calorie = 4, 18J.(b) For how many 20 cm high stairs would a 70 kg man have to climb to burn 1600 calories for it? Ignore the change in thermal energy.(c) How many steps must be climbed if changes of thermal energy are not ignored, but consider that 30% of wasted (chemical) energy are used for the climb?
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18 J = 6688 J Assuming that the average American consumes these excess calories over a period of 16 hours (i.e., waking hours), the average power required would be: Average power = Excess energy / time = 6688 J / 16 hours = 418 J/hour Show more…
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