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Finding Work from Angle, Mass, and Displacement

  1. Nov 15, 2009 #1
    1. The problem statement, all variables and given/known data
    A flight attendant pulls her 73.8 N flight bag
    a distance of 306 m along a level airport floor
    at a constant velocity. The force she exerts is
    42.4 N at an angle of 60.1◦ above the horizon-
    tal.
    a) Find the work she does on the flight bag.
    Answer in units of J.


    2. Relevant equations
    W=Fx * ∆X


    3. The attempt at a solution
    42.2Cos60.1=Fx=21.036
    21.036*42.2=Work?

    I found the displacement in the X direction and multiplied by total displacement to get work. This doesn't seem right to me. Any help?
     
    Last edited: Nov 16, 2009
  2. jcsd
  3. Nov 16, 2009 #2

    tiny-tim

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    Science Advisor
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    Welcome to PF!

    Hi Joel M! Welcome to PF! :smile:

    (have a delta: ∆ and try using the X2 tag just above the Reply box :wink:)
    hmmm … :confused:

    and what happened to the 306? :wink:
     
  4. Nov 16, 2009 #3
    Re: Welcome to PF!

    Oh, thanks got it now. (42.2)Cos(60.1)(306) = 6437J
     
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