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Homework Help: Hlpe please

  1. Oct 8, 2007 #1
    hlpe please!!!

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

    a motorboat that develops 50kW covers a distance of 1km in 6min. with how much force did the water resist the motion of the boat?

    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Oct 8, 2007 #2
    I would use your definitions.

    [tex]P(t) =\frac{dW}{dt} = \frac{d}{dt} \int \mathbf{F} \cdot ds = \mathbf{F}(t) \cdot \mathbf{v}(t)[/tex]

    You have to try something. Basically, with the information you have provided, you could be able to solve differential equations for all I know.
     
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