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Does Centripetal force cause a tangential force?

by Kalus
Tags: centripetal, force, tangential
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Feb19-12, 03:21 PM
P: 37
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?
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Feb19-12, 03:33 PM
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P: 26,148
Hi Kalus!

("/tex" not "\tex" )

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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