How to Calculate Electric Force Without Charge Coordinates | UTexas HW Help

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NINHARDCOREFAN
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https://hw.utexas.edu/tmp/Muddam1/1077041275Xuj.pdf

I'm stuck on fourteen. Without the charge's coordinates how can I calculate the electric force on the charge?
 
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Originally posted by NINHARDCOREFAN
Without the charge's coordinates how can I calculate the electric force on the charge?
The charge is at the origin, coordinates 0,0. (Hint: Problem #14 uses the results of prob #12.)
 
  • #3
Oops.

Didn't take notice of the word "origin". Anyway, you don't need to the answers from #12 because F= k*q1*q2/r^2 and you find force of the charges on the origin charge and take the magnitude of it.
 

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