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Angular velocity of rod

  1. Feb 11, 2014 #1
    1. The problem statement, all variables and given/known data
    A rod of length L and mass M is pivoted at the center C such that it can freely rotate in vertical plane.Initially the rod is at horizontal position.A blob of wax of mass M falls vertically with speed V and sticks to the rod midway between center and one end.If the rod rotates with angular speed ω what will be the angular velocity in terms of V and L?


    2. Relevant equations

    none

    3. The attempt at a solution

    Can i use energy conservation here.The kinetic energy carried by the wax blob will be transferred into rotational energy.Is this approach right?
     
  2. jcsd
  3. Feb 11, 2014 #2

    ehild

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    No, the blob sticks to the rod, it is inelastic collision.

    ehild
     
  4. Feb 11, 2014 #3
    So how do we calculate how much energy was useful from that collision?
     
  5. Feb 11, 2014 #4

    maajdl

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  6. Feb 11, 2014 #5
    i think using conservation of angular momentum will get me the answer.right?
     
  7. Feb 11, 2014 #6

    maajdl

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    Yes, but you should justify this assumption.
     
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