The maximum sustainable mechanical power a human can produce is about 1 3 h p .

Question

The maximum sustainable mechanical power a human can produce is about 13hp. Part A How many food calories can a human burn up in an hour by exercising at this rate? (Remember that only 20.0% of the food energy used goes into mechanical energy.)   W = food calories SubmitMy AnswersGive Up The maximum sustainable mechanical power a human can produce is about 13hp. The maximum sustainable mechanical power a human can produce is about 13hp. The maximum sustainable mechanical power a human can produce is about 13hp. The maximum sustainable mechanical power a human can produce is about 13hp. Part A How many food calories can a human burn up in an hour by exercising at this rate? (Remember that only 20.0% of the food energy used goes into mechanical energy.)   W = food calories SubmitMy AnswersGive Up Part A How many food calories can a human burn up in an hour by exercising at this rate? (Remember that only 20.0% of the food energy used goes into mechanical energy.)   W = food calories SubmitMy AnswersGive Up Part A How many food calories can a human burn up in an hour by exercising at this rate? (Remember that only 20.0% of the food energy used goes into mechanical energy.)   W = food calories SubmitMy AnswersGive Up Part A How many food calories can a human burn up in an hour by exercising at this rate? (Remember that only 20.0% of the food energy used goes into mechanical energy.)   W = food calories SubmitMy AnswersGive Up Part A How many food calories can a human burn up in an hour by exercising at this rate? (Remember that only 20.0% of the food energy used goes into mechanical energy.)   W = food calories SubmitMy AnswersGive Up Part A How many food calories can a human burn up in an hour by exercising at this rate? (Remember that only 20.0% of the food energy used goes into mechanical energy.)   W = food calories SubmitMy AnswersGive Up   W = food calories   W = food calories SubmitMy AnswersGive Up The maximum sustainable mechanical power a human can produce is about 13hp. Part A How many food calories can a human burn up in an hour by exercising at this rate? (Remember that only 20.0% of the food energy used goes into mechanical energy.)   W = food calories SubmitMy AnswersGive Up

Explanation / Answer

1/3 hp = 746/3 = 250 watts = 250 J/s
1 hour = 3600 sec

250 J/s x 3600 sec = 900000 Joules (mechanical energy)

900000 / 0.2 = 4500000 Joules of food energy.

1 food cal = 4200 J

so 4500000 Joules x 1 food cal/4200 J = 1070 food calories

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