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Homework Help: Satellite problem

  1. Nov 16, 2004 #1
    A 500 kg satellite is in a orbit at an altitude of 500 km above the earth's surface. because of the air friction, the satellite eventually falls to the earth's surface, where it hits the ground with a speed of 2.00 km/s.how much energy was transformed into the internal energy by means of friction?
    I really got no clue to solve this one. Could you guy give me some instructions? If you could, give me a lecture about this type of problem. Thank you
     
    Last edited: Nov 16, 2004
  2. jcsd
  3. Nov 16, 2004 #2

    NateTG

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    This is a work-energy problem. Consider solving the equation:
    [tex]KE_0+PE_0=KE_f+PE_f+W_{friction}[/tex]
     
  4. Nov 16, 2004 #3

    krab

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    Take the initial energy (potential plus kinetic) and subtract the final energy.
     
  5. Nov 16, 2004 #4
    for kinetic energy I will us 1/2mv^2 .How do I find the V initial , Also, for Potential energy , I have to use GM1M2/r2 ??? is it right? Thank you
     
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