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Negative Energy

  1. Jan 15, 2014 #1
    the potential energy of a earth-satellite system is -U.

    the kinetic energy of the satellite is K = -U/2.

    the mechanical energy M = -K.

    this is not true.

    the satellite is in equilibrium and the ∂θ change caused is limits to zero.

    the PE of the satellite cannot cause acceleration in magnitude.
  2. jcsd
  3. Jan 15, 2014 #2


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    Science Advisor

    The last line is true.
    If PE=-U, then KE=+U/2, and E=KE+PE=-U/2.
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