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Homework Help: Angular physics problem

  1. Mar 27, 2005 #1
    An astronaut is being tested in a centrifuge. The centrifuge has a radius of 8.5 m and in starting, rotates according to theta= .21t^2, where t in seconds give theta in radians. When t=5.0 s, what are the astronaut's angular velocity?

    I did .21(5.0)^2 / 5, to get angular velocity, but it was wrong. Can someone steer me in the right direction?
  2. jcsd
  3. Mar 27, 2005 #2
    I have no idea what equation that is that your using.

    [tex] \theta(t) = .21t^2 [/tex]

    [tex] \omega(t) = .42t [/tex]

    by the relationship [tex] \omega(t) = d\theta(t)/dt [/tex]
    Last edited: Mar 27, 2005
  4. Mar 27, 2005 #3


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    Why do they give the radius,if they don't ask for the tangential speed...?:bugeye:

  5. Mar 27, 2005 #4
    Probably needs help on just one part of the problem.
  6. Mar 27, 2005 #5
    Ok I see what I was doing. Thanks so much
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