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!

Assistance Needed For Rearranging Equations

  1. Oct 15, 2009 #1
    Im currently studying A2 physics and Im doing potentials and electric fields etc. Ive learnt about Coulombs Law etc. and Im having difficulty rearranging the formulae.
    For example take Coulombs Law. I had to rearrange it for Q2 and I spent ages just trying to rearrange it as I dont know how to do it properly. I used to just use the triangle or learn the expressions.

    Could someone explain me how to arrange coulombs law for q2 or for R.

    Thank You
    Much appreciated.
  2. jcsd
  3. Oct 15, 2009 #2
    It's a sad indication of high school standards when an A2 student can't rearrange a simple equation. I've always been against the triangle method as it allows students to rearrange equations without understanding what's going on. I'm not blaming you - it's the failing of teachers and an increasingly skills based curriculum that reduces the time spent dealing with the maths of physics.

    Anyway, to answer your question take a look at this youtube video -

    That gives all the basics of rearranging equations and there are many more to be found.
    Last edited by a moderator: Sep 25, 2014
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook