Energy Cost of Stair Climbing for Average-Sized Individuals

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The discussion centers on calculating the mechanical energy required for an average-sized individual, weighing approximately 80 kg, to climb nine flights of stairs, totaling a height of 30 meters. Using the potential energy formula PE = mgh, the calculated energy needed is 23,520 joules. This amount translates to roughly 4 kilocalories, which some participants find surprisingly low. The conversation highlights the efficiency of stair climbing as a form of exercise, suggesting that individuals may need to climb multiple flights to achieve significant calorie burn. Overall, the calculations and implications of energy expenditure in stair climbing are examined.
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Homework Statement


How much mechanical energy is needed for avg size person to climb climb up nine flights of stairs?

Homework Equations


E=KE+PE
PE=mgh
KE=1/2mv^2

The Attempt at a Solution


person is about 80kg
g=9.8ms^-2
h is about 3 meters per floor for 10 floors = 30m

so at top, when the person stops climbing there is only PE so E=0+80*9.8*30=23520J

isn't this only like 4 kcals? doesn't that seem low?
 
Last edited:
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Your equation is OK. Did not check your numbers.

Maybe that is why people need to climb many stairs to lose weight!
 

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