Problem 16.27 An exercise machine indicates that you have worked off 2.4 Calorie

Question

Problem 16.27

An exercise machine indicates that you have worked off 2.4 Calories in a minute-and-a-half of running in place.

Part A

What was your power output during this time? Give your answer in watts.

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Part B

What was your power output during this time? Give your answer in horsepower.

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Problem 16.27

An exercise machine indicates that you have worked off 2.4 Calories in a minute-and-a-half of running in place.

Part A

What was your power output during this time? Give your answer in watts.

P =   W  

SubmitMy AnswersGive Up

Part B

What was your power output during this time? Give your answer in horsepower.

P =   hp  

SubmitMy AnswersGive Up

Explanation / Answer

Power is energy divided by time, or the rate of exchange of energy.

2.4c/1.5min * 1.2 Wh/c * 60min/h = 115.2 W

a) P = 115.2 W

b)

One horsepower is equal to 746 watts.

P = 115.2/746 =0.15442 hp

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