# Finding a parametric form and calculating line integrals.

1. May 7, 2015

### YogiBear

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. May 7, 2015

### BvU

Hello Yogi, welcome (belated) to PF !

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

3. May 7, 2015

### YogiBear

Thank you solved, it. <3