Results 1 to 3 of 3

Math Help - Coulombs law problem

  1. #1
    Junior Member
    Joined
    Aug 2010
    Posts
    41

    Coulombs law problem

    A charge of +q is located at the origin, while an identical charge is located on the x axis at x = 0.51 m. A third charge of +5q is located on the x axis at such a place that the net electrostatic force on the charge at the origin doubles, its direction remaining unchanged. Where should the third charge be located?

    I worked this problem out as follows. Please point out if I go wrong.
    F2=(kqq/.51^2)+(5kqq/x^2) which is equal to 2F1
    2F1=(2kqq/.51^2)

    So

    (kqq/.51^2)=(5kqq/x^2)

    So

    1/(.51^2)=5/(x^2)

    5(.51^2) =x^2

    1.3005=x^2

    x=1.14

    Can somemone confirm this? I only have one more try on my homework.
    Thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    12,105
    Thanks
    970
    looks fine to me
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member grgrsanjay's Avatar
    Joined
    May 2010
    From
    chennai,tamil nadu
    Posts
    143
    Thanks
    1
    perfectly alright i think
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. More Coulombs Law and Electric Fields!
    Posted in the Math Topics Forum
    Replies: 2
    Last Post: December 30th 2009, 09:30 AM
  2. Coulombs law and Electric Fields
    Posted in the Math Topics Forum
    Replies: 6
    Last Post: December 30th 2009, 08:55 AM
  3. Coulombs Law-Basic Idea
    Posted in the Math Topics Forum
    Replies: 1
    Last Post: July 30th 2009, 03:40 AM
  4. [SOLVED] coulombs law help
    Posted in the Math Topics Forum
    Replies: 4
    Last Post: March 10th 2009, 02:51 AM

Search Tags


/mathhelpforum @mathhelpforum