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## Homework Statement

A particle with charge −8 μC is located on the x-axis at the point 8 cm, and a second particle with charge −6 μC is placed on the x-axis at −6 cm.

What is the magnitude of the total electrostatic force on a third particle with charge −4 μC placed on the x-axis at −2 cm?

Answer in units of N

## Homework Equations

The Coulomb constant is 9.0× 10^9 N·m2/C2.

Fe = (kq1q2/r^2)

## The Attempt at a Solution

[(9*10^9)(4*10^-6)(8*10^-6)]/(0.1)^2 + [(9*10^9)(4*10^-6)(6*10^-6)]/(0.04)^2

The final answer I get is 163.8 N, which is incorrect.