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Work done by a person climbing stairs

  1. Nov 30, 2013 #1
    1. The problem statement, all variables and given/known data
    Calculate the work done by a 52.98 kg person, who climbs a set of 0.20 m tall stairs (starting from rest) in 2.96s.
    Calculate the power required to achieve this.


    2. Relevant equations
    w=F•d

    3. The attempt at a solution
    My issue with this question has been identifying the force which is acting in the situation. I know that Fg applies (mass • 9.81 m/s) and that there must be an applied force of some sort because the person is moving (working against gravity, I suppose?), but I am not sure which information I should use to calculate the "F" variable in the w=F•d equation. I think they want the power in watts (Joules per second).
     
    Last edited: Nov 30, 2013
  2. jcsd
  3. Nov 30, 2013 #2

    tiny-tim

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    Homework Helper

    Hi Sen.Lemonsnout! Welcome to PF! :smile:

    Assume that he climbs at a constant speed …

    then the net force is zero, so the force he uses is … ? :wink:
     
  4. Nov 30, 2013 #3
    Thanks- I was definitely overthinking things!
     
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