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Homework Help: What is the speed of the satellite?

  1. Sep 6, 2011 #1
    1. The problem statement, all variables and given/known data

    An Earth satellite moves in a circular orbit 605 km above the Earth's surface. The period of the motion is 96.6 min.

    What is the speed of the satellite?

    2. Relevant equations

    3. The attempt at a solution

    First, I know that it is orbiting 605 km above earth's surface. So, that number plus the radius of earth gives a total for the radius of the motion. That comes out to be about 6976000 meters.

    Then, I used the equation:

    T = (2pir)/(v)

    96.6 = (2pi(6967000)) / (v)

    v = 453742.24

    But it's marking it as incorrect. Any ideas?
  2. jcsd
  3. Sep 6, 2011 #2
    Shoot me in the face for not converting units.
  4. Sep 6, 2011 #3
    if 2pie radius/period=speed then add radius of earth in meters to 605E3meters plug that in for r, change the 96.6minutes to seconds plug that in for T and you should get the right answer.
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