Calculate the work done

1. May 31, 2016

alijan kk

1. The problem statement, all variables and given/known data
watch the image

2. Relevant equations

3. The attempt at a solution
make me understand the symbols like i^

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2. May 31, 2016

ehild

$\hat i$ , $\hat j$ , $\hat k$ are the unit vectors in the directions x, y, z.