Hi all,(adsbygoogle = window.adsbygoogle || []).push({});

(This is part of a DJGriffiths, 3rd ed., problem: Prob. 1.28)

Line Integral: Int(yzdy)[lower limit = (1,1,0); upper limit = (1,1,1)]but y does not change and is supposed to be integrated, while z changes and is not integrated.

I have 2 questions:

[1] I take z out of the integral since the integral is only along the y direction,

z*Int(ydy) = zy^2/2 .

Now evaluate: ... but z is changing - is the line integral a fnc of z?

[2] Trying to evaluate the above "answer" I get z*y^2/2 (from y=1 to y=1) which means z*(1/2 - 1/2) = 0.

Edit:at first I thought that z (or y) can be expressed as a fnc of y (or z) but that is not the case for this line segment.

thx in advance!

-LD

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Line Integral: Int(yzdy) but

**Physics Forums | Science Articles, Homework Help, Discussion**