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A point on the rim of a 0.30-m-radius rotating

  1. Dec 8, 2008 #1
    A point on the rim of a 0.30-m-radius rotating wheel has a tangential speed of 4.0 m/s. What is the tangential speed of a point 0.20 m from the center of the same wheel?

    a. 1.0 m/s
    b. 1.3 m/s
    c. 2.7 m/s
    d. 8.0 m/s

    i have been trying to do this for hours now.somebody please help
     
  2. jcsd
  3. Dec 8, 2008 #2

    CompuChip

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    What formula do you know that relates tangential speed to radius?
     
  4. Dec 8, 2008 #3
    can anyone help me?
     
  5. Dec 8, 2008 #4

    CompuChip

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    Please read this first. Then, you might want to answer that question. The solution immediately follows (i.e. I cannot make it any easier for you without giving the answer).
     
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