Question

Two point charges are fixed on the y axis: a negative point charge q1 = -26 μC at y1 = +0.18 m and a positive point charge q2 at y2 = +0.31 m. A third point charge q = +8.2 μC is fixed at the origin. The net electrostatic force exerted on the charge q by the other two charges has a magnitude of 31 N and points in the +y direction. Determine the magnitude of q2.

Answer 1

U hv to use the equation
F=(1/4*pi*efcylon not)(q1*q2/r^2

Answer 2

And F=F1+F2

Answer 3

U know force between 2 positive charges is positive

Answer 4

Foce between a positive n a negative charge is negative

Answer 5

Here F=31N

Answer 6

U can draw it for solving