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Need help with physics question about Calories.

  1. Nov 1, 2005 #1
    :yuck: Can anyone help me figure out this question?
    If you have just consumed 500 Calories of food, how many times do you have to walk up a flight of stairs in order to burn all the Calories?

    A flight of stairs is = to 4 meters
    500 Calories * 4180 Joules = 2090000 Joules


    Thanks :biggrin:

    Warn: (0%)
  2. jcsd
  3. Nov 1, 2005 #2


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    Staff Emeritus
    Science Advisor


    Make sure you get food calorie and thermodynamic calorie correct, which it appears you did.

    One has to calculate the change in gravitational potential energy for 4 meters, and determine how many times one must traverse 4m to equal the 500 food calories.

    One has to do work going up, but one also does work going down (although not at the same rate).
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