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Electric force angles problem 
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#1
Mar3008, 10:23 AM

P: 82

1. The problem statement, all variables and given/known data
Three positive particles of charges 11.0 µC are located at the corners of an equilateral triangle of side d = 14.0 cm (Fig. 1638). Calculate the magnitude and direction of the net force on each particle. Fig. 1638 2. Relevant equations F = KQ_1Q_2/r^2 3. The attempt at a solution F = KQ_1Q_2/r^2 F = (9X10^9)(1.1X10^5)^2/.14^2 F = 55.561 N for all points  Q1, Q2, and Q3 (correct) Q1 angle = 90 degrees (correct) Q2 angle = ? Q3 angle = ? I need to find the directional angle for particles Q2 and Q3  I am unsure how to find these. I was thinking I might have to draw a triangle? Thanks, Bensky 


#2
Mar3008, 10:24 AM

P: 1,754

It's an equilateral triangle.
[tex]\angle Q_1=\angle Q_2=\angle Q_3[/tex] [tex]\angle Q_1+\angle Q_2+\angle Q_3=180[/tex] 


#3
Mar3008, 10:39 AM

P: 82




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