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Homework Help: Chain velocity?

  1. Apr 15, 2009 #1
    chain velocity??

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

    A chain of metal links with total mass M = 6 kg is coiled up in a tight ball on a low-rriction table. you pull on a link at one end of the chain with a constant force F = 67 N. Evntually the chain straightens out to its full lenght L = 0.9 m, and you keep pulling until you have pulled your end of the chain a total distance d = 2.9 m, consider the point particle system. what is the speed of the chain at this instant?

    i know in the point particle system the center of mass move 2.45 m. you still have the 67 N force ect.. but not sure how to find velocity? i know i can find acceleration using F = m*a
    but then what do i do with the a to find v? i know there is some relationship and when i look it up on google it does not explain it really well so hopeing you can.
    thanks for the help!!
  2. jcsd
  3. Apr 15, 2009 #2
    Re: chain velocity??

    never mind i got it now.

    it is
    v(final)^2 = v(inital)^2 + 2*a*d
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