What work is done by gravity when a person weighing 75 kg climbs the stairs from the first to the sixth floor
| December 14, 2020 | education
What work is done by gravity when a person weighing 75 kg climbs the stairs from the first to the sixth floor, if the height of each floor is 3m.
Given: m = 75 kg. h = 3 m. g = 10n / kg.
Analysis: A = FS => mgh.
Decision :
h = 6 * 3m = 18m. A = 75kg * 10n / kg * 18m = 13500J = 13.5kJ.
Answer: 13.5kJ.
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