1. Feb 27, 2010 #1

   Lucy573

   

   1. The problem statement, all variables and given/known data
   
   Rearrange F=Kq1q2/r^2 to make K the subject
   
   2. Relevant equations
   
   
   
   3. The attempt at a solution
   
   K=Fr^2/q1q2 - is this correct? Sorry Im new to this!! Thanks :)

    

   Lucy573, Feb 27, 2010
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3. Feb 27, 2010 #2

   shallgren

   

   Yes, that's correct.

    

   shallgren, Feb 27, 2010
4. Feb 27, 2010 #3

   Lucy573

   

   Fab thanks - should have more faith!!!

    

   Lucy573, Feb 27, 2010
5. Feb 27, 2010 #4

   shallgren

   

   If you want to check your answer, just make up values for k, q1, q2, and r and find F. Then use that F along with the same values for q1, q2, and r and see if you get what you assigned to k originally.

    

   shallgren, Feb 27, 2010

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