# Charges and Trig question

Lilian Chan

## Homework Statement

What is the magnitude of this force?

Coulomb's Law
Trig equations

## The Attempt at a Solution

(.05 m)xcos(60)=0.025m (the distance between the two known charges)
F(between the two known charges)=(9x20^9)(1x10^-9)(10x10^-9)/(0.025)^2=1.44x10^-4
F(that points down)=sin(60)*1.44x10^-4=1.25x10^-4N

The homework system says I got it wrong but I'm not seeing where.

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