- #1
jelliDollFace
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Homework Statement
li have three charges, 2 with same charge (magnitude and sign) and 1 with a smaller charge(smaller magnitude and opposite sign to the other two). how would i position them on a line so that the net force on any of them is zero
Homework Equations
electric force, F = k(q1)(q2)/r^2 where q1 and q2 are point charges, k = 9*10^9, r is distance between charges
electric force, point charge Fp = kq/r^2
The Attempt at a Solution
where magnitude q_a > magnitude q_b
fnet = k(+q_a)/a^2 + k(+q_a)/b + k(-q_b)/c^2
0 = k(+q_a)/a^2 + k(+q_a)/b + k(-q_b)/c^2
k(q_b)/c^2 = k(+q_a)/a^2 + k(+q_a)/b
now what do i do? is my relationship correct?