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## Homework Statement

1. Calculate the electric field at field point 3i + 6j created by a 5.50uC electric charge at 13i + 8j

2. Calculate the electric force on an electron at field point 3i + 6j and in the same electric field calculated

for the prior problem.

## Homework Equations

## The Attempt at a Solution

Going to combine 2&3 together to see how far I get

So I know I need to find the difference of the two so:

3-13= 10i

6-8= -2j

|r|=sqrt (10^2-2^2) =sqrt (104)

Then I have r^=10/sqrt(104)i+2/sqrt(104)j

Then that is where I get lost there like some many equations to choose from I do not know which one to use.

Cause electric field= force/charge.

So would it be r^/5.5uC?