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I need a lil hw help

  1. Sep 25, 2007 #1
    An Earth satellite moves in a circular orbit 690 km above the Earth's surface. The period of the motion is 98.4 min.
    (a) What is the speed of the satellite?
    in m/s
    (b) What is the magnitude of the centripetal acceleration of the satellite?
     
  2. jcsd
  3. Sep 25, 2007 #2

    hage567

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    You need to show some effort to get help. What have you tried so far?
     
  4. Sep 25, 2007 #3
    first i converted to meters....radius now equals 690000m. and converted 98.4 min to 5904 sec.
    2pi 690000/ 111.667
    i plugged that into the answer and was told that i had done it wrong.
    i also came up wit 734 and 34 im extremly confused
     
  5. Sep 25, 2007 #4

    hage567

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    The satellite is 690 km above the surface of the earth. What is its distance from the centre of the earth? That's what the radius of the orbit is.
     
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