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Homework Help: Finding a parametric form and calculating line integrals.

  1. May 7, 2015 #1
    1. The problem statement, all variables and given/known data
    Let C be the straight line from the point r =^i to the point r = 2j - k
    Find a parametric form for C. And calculate the line integrals ∫cV*dr and ∫c*v x dr where v = xi-yk. and is a vector field

    2. Relevant equations


    3. The attempt at a solution
    For parametric form (1-t)i + (2*t)j - t k
    For second part i need help
     
  2. jcsd
  3. May 7, 2015 #2

    BvU

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    Hello Yogi, welcome (belated) to PF :smile: !

    So you have ##\vec v = x \hat \imath - y \hat k## and need ##\vec {dr}##, right ?

    The path is from (1,0,0) to (0,2,1) , starts at t = 0 and ends at t = 1 in the parametric form. What would be ##\vec {dr}## ?

    When I think over what to do for this one, I make a little drawing and check
     
  4. May 7, 2015 #3
    Thank you solved, it. <3
     
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