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Energy transfer while walking.

  1. May 3, 2013 #1
    When I walk do I transfer energy to the ground via my foot, if so would the ground/earth than gain an extremely small amount of mass because e=mc2
     
  2. jcsd
  3. May 3, 2013 #2

    Danger

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    It won't gain mass, but will either gain or lose a tiny bit of rotation (dependent upon the direction in which you're walking). It's more the "equal and opposite reaction" concept than the "e=mc2" one.
     
  4. May 3, 2013 #3
    Thanks but do I still transfer a bit of energy to the ground.
     
  5. May 3, 2013 #4

    Danger

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    Yes, the same amount that it transmits to you. When I wrote "rotation", I was implying "rotational energy". I should have been clearer.
     
  6. May 3, 2013 #5
    Thank you very much.
     
  7. May 3, 2013 #6
    The momentum you transfer to the ground is the same as the momentum that you gain. The energy is different though. The ground only receives a very tiny fraction of the energy. Nearly all of it goes into you.
     
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