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**Electric force angles problem :(**

**1. Homework Statement**

Three positive particles of charges 11.0 µC are located at the corners of an equilateral triangle of side d = 14.0 cm (Fig. 16-38). Calculate the magnitude and direction of the net force on each particle.

Fig. 16-38

**2. Homework 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