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Homework Help: W = Integral force

  1. Mar 9, 2010 #1
    1. The problem statement, all variables and given/known data
    A force F = (4xi + 3yj) N acts on an object as the object moves in the x direction from the origin to x = 5.0m. Find the work W= Integral F x dr done by the force on the object


    2. Relevant equations
    W= ∫Fx dr


    3. The attempt at a solution
    ∫4xi 2x^2 0 to 5
     
  2. jcsd
  3. Mar 9, 2010 #2

    Matterwave

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    Your work looks right, just evaluate your integral.
     
  4. Mar 9, 2010 #3
    I checked the solution manual and for some reason they extracted the 4 outside the integral 4 ∫(x^2)/2 0 to 5

    Is the 4 a constant ? is that why they pulled it out
     
  5. Mar 9, 2010 #4

    Probably a typo.
     
  6. Mar 9, 2010 #5

    Matterwave

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    4 is just a number, how can it not be a constant?
     
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