1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Surface Integrals

  1. Apr 11, 2009 #1
    Find the surface area of the the portions of the cylinder y^2 + z^2=a^2 bounded by x^2 + y^2 = a^2

    not really sure how to go about this. tried to set up a double integral and use polar coordinates but dont know what boundaries to use etc.
  2. jcsd
  3. Apr 11, 2009 #2


    User Avatar
    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi s_engineering! Welcome to PF! :wink:

    Show us what you've tried, and where you're stuck, and then we'll know how to help! :smile:
  4. Apr 11, 2009 #3
    this is what i've tried:

    fy = 2y; fz=2z

    A(S)=int int sqrt{1+4y^2 +4z^2}dA

    then I switched to polar coordinates i tired to integrate from theta=0 to pi/2 and r= 0 to a
    but didn't get anywhere with this.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook