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Energy And Gravity

  1. Apr 23, 2013 #1

    adjacent

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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?
     
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  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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