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Homework Help: Finding the weight

  1. Feb 2, 2010 #1
    1. The problem statement, all variables and given/known data

    The largest turtle ever caught in the US had a mass of over 800 kg. Supoose this turtle were raised 5.45 m onto the deck of the research ship. If it takes 4.60 x 10^4 J of work to lift the turtle this distance at a constant velocity, what is the turtle's weight?

    2. Relevant equations

    3. The attempt at a solution

    Weight's measured in N.
    so what formula would you use?
    Δ(KE) = 1/2 mv^2?
  2. jcsd
  3. Feb 2, 2010 #2
    Assume the turtle is lifted at a very slow speed. The change in energy is all a change in potential energy which is

    m*g*h = 4.60 x 10^4 J
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