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Does Centripetal force cause a tangential force?

  1. Feb 19, 2012 #1
    If I have a string with a lump on the end and is being swung in a circle with a continuous angular velocity then I know that:

    [tex] F= m\frac{v^2}{r}[/tex]

    or using angular velocity,

    [tex] F= m r \omega^2 [/tex]

    But, is there a tangential force acting at the point of mass in its instantaneous direction, and if so, what is it equal to?
    Last edited: Feb 19, 2012
  2. jcsd
  3. Feb 19, 2012 #2


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    Hi Kalus! :smile:

    ("/tex" not "\tex" :wink:)

    There's a tangential force only if there's a tangential acceleration (Newton's second law).

    If the angular speed is constant, there isn't.
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