1. Not finding help here? Sign up for a free 30min 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!

Columb's law Problem

  1. Jan 11, 2014 #1
    1. The problem statement, all variables and given/known data
    Charge q2 in the figure(Figure 1) is in static equilibrium. Assume that q = 4.4nC .

    Figure:http://session.masteringphysics.com/myct/itemView?assignmentProblemID=31833513&offset=prev

    what is q1 ( distance between q2 and q is 10com and distance between q1 and q2 is 20cm)
    2. Relevant equations
    F=k*q1*q2/(2d)^2 + k*q*q2/d^2 = 0

    I then isolate for q1
    3. The attempt at a solution
    My answer is 1.7x10^-8 C which is wrong, I have converted all givens to Standard units
     
  2. jcsd
  3. Jan 11, 2014 #2

    vela

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Education Advisor

    We don't have access to the figure since we can't log into the publisher's site.
     
  4. Jan 11, 2014 #3
    Thanks for pointing that out, heres the image
     

    Attached Files:

  5. Jan 11, 2014 #4

    vela

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Education Advisor

    Maybe it's just a matter of rounding or sig figs.
     
  6. Jan 12, 2014 #5
    i don't believe so, do you come to the same conclusion?
     
  7. Jan 13, 2014 #6

    vela

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Education Advisor

    Yes, but when I round to two sig figs, I get a slightly different answer. Also, it could be that you didn't specify the correct sign of the charge.
     
  8. Jan 13, 2014 #7
    what do get as your final answer? and the charge would be + correct?
     
  9. Jan 13, 2014 #8
    it accepted 16nC thanks for the help
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Columb's law Problem
  1. Columb's law (Replies: 5)

  2. Columbs Law (Replies: 1)

Loading...