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Energy And Gravity

  1. Apr 23, 2013 #1


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    For an object to be moved or accelerated it needs energy.From where does the energy for gravitation comes from?
    For any answer about spacetime,Why do matter curves space?
  2. jcsd
  3. Apr 23, 2013 #2

    Simon Bridge

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    Hey adjacent, these are common questions - have you tried looking for answers elsewhere?
    You get better value for asking for clarification of a previous answer than just asking cold.

    In short:
    Separating masses requires work - which stores energy in the gravitational field.
    When the masses are allowed to move freely, that energy gets released as kinetic.
    Why? Them's the rules.

    Note: the above was in the classical model - in GR, energy curves space. Mass is one form of energy.
    Why does energy curve space? Again - them's the rules. It's a bit like asking why circles are round.
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