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Another Halliday and Resnick error? Linear momentum conservation/inelastic collisions

  1. Nov 1, 2012 #1
    1. The problem statement, all variables and given/known data

    See the attached photo for the problem statement.


    2. Relevant equations



    3. The attempt at a solution

    The provided solution is 25 cm. I obtain about 13.4 cm, however. I am using the conservation of linear momentum and the conservation of energy (between the initial kinetic energy of the blocks and the final kinetic energy of the combined block system, along with the potential energy stored within the spring) simultaneously. Can someone verify (or disprove) my result?
     

    Attached Files:

  2. jcsd
  3. Nov 1, 2012 #2

    ehild

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    Re: Another Halliday and Resnick error? Linear momentum conservation/inelastic collis

    Holliday and Resnick are right and your result is wrong. Show your work in detail.


    ehild
     
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