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

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To calculate the electric force on a charge located at the origin without its coordinates, one can use the formula F = k*q1*q2/r^2. The charge at the origin is considered to have coordinates of 0,0. The solution involves determining the forces exerted by other charges on this origin charge and calculating their magnitudes. Reference to problem #12 is unnecessary for this calculation. Understanding the concept of the origin is crucial for solving the problem effectively.
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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.)
 
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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