Jan25-11, 11:22 PM
1. The problem statement, all variables and given/known data
Attached picture with the given variables and questions stated.
2. Relevant equations
E = kq / (r^2)
3. The attempt at a solution
I've taken found the linear electric field magnitudes in relationship to the point
q1 = 3.37e-9
q2 = 6.74e-9
q3 = 3.92e-9
r1 = .647m
r2 = 1.941m
E1 = (k*(q1))/(r1) = 72.3540189055
E2 = (k*(q2))/(r2) = 16.0789708679
I am having difficulty figuring out how to calculate the third vector into the total, any thoughts?
Jan26-11, 12:02 AM
Pythagoras tells us that:
r32 = r12 + r22
The y-component of r3 is |r1|/|r3| .
The x-component of r3 is ‒|r2|/|r3| .
It may also help to notice that 1.941 = 3×0.647 .
|r1|/|r3| = |r1|/√(10)
|r2|/|r3| = 3|r1|/√(10)
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