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Help with black holes!

  1. Oct 20, 2009 #1
    I have a question about black holes and energy but have no idea what to do. if someone could just point me in the right direction.

    the question asks to consider a mass spiraling into a black hole, starting with energy E=0 at infinity. I have to determine E of the object when orbiting the black hole at distance r classically. I'm just stuck right now, not sure what is wrong.
  2. jcsd
  3. Oct 20, 2009 #2


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    Homework Helper

    The kinetic energy E, or the total energy? The total energy is trivial: because of the conservation of energy, total energy is 0, just as it was when it was at infinity.
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