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Stair climbing and energy

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


2. Homework Equations
E=KE+PE
PE=mgh
KE=1/2mv^2

3. 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:
688
1
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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