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Pilot averages 190W over distance. Mass, time, power given. find H

  1. Aug 19, 2014 #1
    1. The problem statement, all variables and given/known data
    In 1979 the human powered Gossamer Albatross flew across the English Channel. The pedalling pilot averaged 190 W over the distance. If the pilot's power was used to lift a 110 kg mass, to what height would he lift the mass in a time of 25 s?


    2. Relevant equations
    P = W/T
    W=FxD


    3. The attempt at a solution
    All I am looking for is the formula to solve this question.
    P = 190 J/S
    M = 110 kg
    Time = 25 s

    How to find the height?
     
  2. jcsd
  3. Aug 19, 2014 #2

    andrevdh

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    How much work would he have done during this period?
    Lifting a mass up ... what happens to its energy?
     
  4. Aug 19, 2014 #3
    Work = F x D


    F=mg
    F=110 x 9.8
    F=1078 N

    But how do we find the distance?
     
  5. Aug 19, 2014 #4

    olivermsun

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    190 W is a quantity of power. Check out the definition (and units) of power.
     
  6. Aug 19, 2014 #5

    andrevdh

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    Use the power rating to calculate the amount of work that the pilot will do during the stated period of time.
     
  7. Aug 19, 2014 #6

    CWatters

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    Instead of W=FD think about W=mgh
     
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