- #1

Goatscholar18

- 2

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## Homework Statement

In this problem I am trying to understand the solution for finding the net force on charge 3 due to charge 1.

However, I am getting stuck already on F31x.

## Homework Equations

F=kqq/r^2

## The Attempt at a Solution

I found theta by tan-1(0.5/1)=26.565degrees

r= sqrt (1^2+0.5^2) = sqrt (1.25)= 1.118

So I did F31x=[k(3X10-6)(-2X10-9)]/ (1.118^2) = 4.32 X 10^5(cos26.565)=-3.86X10^-5N in the i direction

this is obviously incorrect but I don't understand why please help.

Thank you![/B]