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Stair climbing and energy

  1. Oct 27, 2011 #1
    1. The problem statement, all variables and given/known data
    How much mechanical energy is needed for avg size person to climb climb up nine flights of stairs?


    2. Relevant 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: Oct 27, 2011
  2. jcsd
  3. Oct 27, 2011 #2
    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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