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Patrickas
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Homework Statement
q1 = 10^-9 C
q2 =16*10^-9 C
Distance between q1 and q2 is 7*10^-3m
What force will affect a q3=2*10^-9 charge, which is 3*10^-3m from the q1 and 4*10^-3m from q2?
Homework Equations
So the triangle is not right angled which means i can't use the pitagorean theorem.
ok so i think i nede to use E=q/4*pi*electric const*r^2
And when i find the e3 i would use F=E3q3
The Attempt at a Solution
So i find the E1=10^7C/C and E2=0.9*10^7N/C then i get stuck at trying to get the E3
I also tried http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html multiple point charges got the e3 but when put into F=E3*q3 i get the 3.6*10-2 where the answer is 2*10^-3
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