Strength of electrostatic force

AI Thread Summary
The discussion revolves around calculating the electrostatic force on a charge located at the top of an equilateral triangle formed by three point charges. The Coulomb constant is provided, and the side length of the triangle is 0.19 m. The user has calculated the force between the top charge and one of the other charges (F1) but is unsure how to proceed with the second force (F2) and how to perform vector analysis. There is a request for assistance with vector components and a suggestion to upload a diagram for clarity. The main focus is on understanding the application of Coulomb's law and vector decomposition in this electrostatic scenario.
bastige
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Homework Statement


Three point charges are located at the corner of an equilateral triangle. The Coulomb constant is 8.98755 X 109 N*m2 / C2
What is the strength of the electrostatic force on the top charge? Answer in units of N.

Length of each side is .19m

Photo: http://rs300l32.rapidshare.com/files/102321145/876fa4a066b34fc617aee82211671f78.jpg


Homework Equations



F= [k(q1)(q2)] / r^2

The Attempt at a Solution



I know I must get F1 & F2, but then I don't know what to do

F1=[k(2.68E-6)(1.32E-6)] / .19^2 = .880730107

F2= [k(2.68E-6)(-3.93E-6)] / .19^2



I
 
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can you please upload the diagram to imageshack.us?
 
Vector analysis. Break the force into its components.
 
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