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Homework Statement
A charge is to be placed at the empty corner of a rectangle to make the net force at corner A point along the vertical direction. What charge (magnitude and algebraic sign) must be placed at the empty corner if the three charges have the same charge of +8.45 μC?
Homework Equations
F = kq1q1/r^2
The Attempt at a Solution
because we know that the net force on A is going to be in the vertical direction we know this is the resultant. Therefore i know the horizontal forces must cancel out..but isn't there only one existing horizontal force coming from the charge at the bottom right corner?
F = (8.99x10^9)(8.45 x10^-6)^2/d^2 [/B]
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