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The gravitational force of energy

  1. Feb 2, 2013 #1


    Staff: Mentor

    Energy gravitates. Is is so simple as to replace M in gravitational euqations with E/c*c ?

  2. jcsd
  3. Feb 2, 2013 #2


    Staff: Mentor

    Whoops, forgive me for screwing up the latex. I clicked on post too early.
  4. Feb 2, 2013 #3


    User Avatar
    Staff Emeritus
    Science Advisor

    Wouldn't you just replace it with E after finding the equivalent energy content for an objects mass?
  5. Feb 2, 2013 #4
    If it's internal energy, e.g. heat or chemical, yes it is that simple. I'm not sure about kinetic energy though. Especially when the object's velocity is close to c.
  6. Feb 3, 2013 #5


    User Avatar
    Science Advisor

    For kinetic energy, I believe the answer lies in the Einstein field equations, but I don't know how to solve the Weyl curvature. But, there is a frame dragging effect from a moving mass, which creates a gravity which isn't radial. There's a formal analogy to magnetism, called gravitoelectromagnetism https://en.wikipedia.org/wiki/Gravitoelectromagnetism, which might answer your question.
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