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Homework Help: Work done on stone

  1. Feb 12, 2010 #1
    1. The problem statement, all variables and given/known data
    A stone has mass 2.5 kg is placed in a liquid. It falls with constant speed 2 ms-1 and travels 80 cm. Find the work done

    2. Relevant equations
    W = delta Ek

    3. The attempt at a solution
    The work done = 0 because there is no change in kinetic energy. Am I right?

  2. jcsd
  3. Feb 12, 2010 #2
    Oh my god..I'm so sorry I've posted oin the wrong section. Please move this thread to the appropriate section. I'm really sorry

  4. Feb 12, 2010 #3


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    Homework Helper

    The stone is moving in liquid with terminal velocity. So the net force acting on it zero. So the work done on the stone is zero.
  5. Feb 13, 2010 #4
    Thanks a lot rl.bhat !! :smile:

    And I'm sorry for posting in wrong section.
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