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A man of mass 70kg rides a bicycle of mass 15kg at a steady speed of 4

  1. Oct 24, 2011 #1
    1. The problem statement, all variables and given/known data

    a man of mass 70kg rides a bicycle of mass 15kg at a steady speed of 4 ms-1 up a road which rises 1.0 m for every 20m of its length. what power is the cyclist developing if there is a constant resistance to motion of 20N

    2. Relevant equations

    (P= F*V) , ( p= W/t)

    3. The attempt at a solution
     
  2. jcsd
  3. Oct 24, 2011 #2

    Delphi51

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    Homework Helper

    Re: power

    I suggest you work with a distance of 20 m. Figure out the height and potential energy gained over that distance. Figure out the time it takes to go 20 m. Then you will be in a position to use one of your power formulas.
     
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