math_proof Group Title line integral over the vector field one year ago one year ago

1. math_proof

$F= \frac{ <x,y> }{ (x^2+y^2)^{3/2} }$ on the line segment from (2,2) to (10,10)

2. math_proof

i found r(t)= <2+8t, 2+8t> so then i have trouble calculating F

3. math_proof

i got the answer 2/5 is it right?

4. henpen

Does the question mean $F=(\frac{x}{(x^2+y^2)^{1.5}},\frac{y}{(x^2+y^2)^{1.5}})$?