In the Biomedical and Physical Sciences building at MSU there are 134 steps from
ID: 1411979 • Letter: I
Question
In the Biomedical and Physical Sciences building at MSU there are 134 steps from the ground floor to the sixth floor. Each step is 16.5 cm tall. It takes 5 minutes and 29 seconds for a person with a mass of 82.7 kg to walk all the way up. How much work did the person do? Submit Answer Tries 0/20 What was the average power performed by the person during the walk? Submit Answer Tries 0/20 How many food Calories did the person burn during the walk? (1 Cal 4.1868 kJ. Do not enter unit for this part.) Submit Answer Tries 0/20Explanation / Answer
Here
number of steps , N = 134
h= 16.5 cm = 0.165 m
t = 5 min 29 s = 329 s
m = 82.7 Kg
work done by the person = m * g * h * N
work done by the person = 82.7 * 9.8 * 0.165 * 134 J
work done by the person = 17919 J
the work done by the person is 17919 J
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avearge power performed by person = work done/time
avearge power performed by person = 17919/329 W
avearge power performed by person = 54.5 W
the avearge power performed by person is 54.5 E
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food Calories burned = 17919 J * 1 *10^-3 kJ * Cal/(4.1868 kJ)
food Calories burned = 4.2798 Calories
food Calories burned is 4.2798 Calories