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Physics problem: (speed of a point on earth)

  1. Sep 15, 2004 #1
    What is the speed of a point on the equator of the Earth due to Earth's daily rotation?

    What is the speed of a point at latitude of 45 degrees N?

    Can I use the radial acceleration equation:
    a = (V^2) / r

    or

    v = (2*pi*r) / period
    where period = 24 hours = 86400s
     
  2. jcsd
  3. Sep 15, 2004 #2

    Doc Al

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    Staff: Mentor

    Well... since the problem asks for speed, don't you think you should use the formula for speed? :smile: (Be sure to use the correct radius.)
     
  4. Sep 15, 2004 #3
    How do I figure out the radius at 45 degress latitude?
     
  5. Sep 15, 2004 #4

    Doc Al

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    Staff: Mentor

    Draw yourself a picture. You'll find a right triangle whose hypotenuse is the radius of the earth. One of the sides is the radius you want. Use some trig.
     
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