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Homework Help: Easy Circular Motion Problem that I can't get right!

  1. Oct 6, 2009 #1
    The astronaut orbiting the Earth in Figure P4.32 is preparing to dock with a Westar VI satellite. The satellite is in a circular orbit 470. km above the Earth's surface, where the free-fall acceleration (centripetal acceleration) is 8.19 m/s2. Take the radius of the Earth as 6370 km.

    Determine the speed of the satellite in km/h.

    THis is a circular motion problem where a = v^2/r can be used right?
    8.19 m/s^2 converted to km/h^2 = 1061.42 km/h^2

    sqrt(1061.424*(470+6370) = 2694.46

    my answer was 2694.46; 2690 but the system is telling me that I'm off by a multiple of ten. What am I doing wrong?
  2. jcsd
  3. Oct 6, 2009 #2
    I think your conversion from m/s to km/h is wrong...
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