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Tension in different parts of a rod pivoted at1 end & rotating in HP

  1. Jul 23, 2013 #1
    I read that if a bar is pivoted at one end and is rotating in a horizontal plane, the tension at a specific point decreases as you go away from the pivoted end.

    Only inference I could draw from this is that the centrifugal force, which is the cause of tension, increses as you go towards the free end. But as the rod is a rigid body, tension at a certain point also acts on all points preceding it and the point closest to the pivot has the highest tension.

    Is that correct?
  2. jcsd
  3. Jul 25, 2013 #2


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    hi siddharth23! :smile:

    yes, the tension is greatest near the centre …

    the tension at r has to supply the force to keep the whole rod from r to R,

    so it's bound to be greater as r gets smaller

    (alternatively , if you look at just the bit between r and r + dr, the tension at r has to supply the centripetal acceleration, ω2r, after you've subtracted the tension at r + dr !)
  4. Jul 25, 2013 #3
    Thanks a lot Tim..! :)
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