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A man with a mass of 110 kg decides to lose weight by climbing the stairs...

A man with a mass of 110 kg decides to lose weight by climbing the stairs in his office building several times a day. With his current daily activities and food intake, his weight is stable, but he would like to lose 0.5 kg per week without reducing food intake. Data shows that a person must burn 8000 Cal to lose 1 kg of mass (1 Cal = 4.19 x 103 J). If each story of the office building has a height of 4 m, how many stories per day must the man climb (assume a five-day work week)? Also assume negligible heat transfer from the man to the environment.

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Answer #1

Here, total calories to burn =   5 * (mgh)

=> 4000 * 4.19 x 103 = 5 * (110 * 9.8 * 4 * n)

=> n = 777.36 stories per day

=>    stories per day must the man climb   =   777.36

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