- #1

Minihoudini

- 28

- 0

## Homework Statement

A charged particle A exerts a force of 2.62microNewtons to the right on a charged particle B when the particles are 13.7 mm apart. Particle B moves straight away from A to make the distance between them 17.7mm. What vector force does it then exert on A?

## Homework Equations

I know its easy, very, but for the love of god I can't figure this out.

## The Attempt at a Solution

I know that they are both positive particles, so I am assuming both are +1.60x10^-19c.

Also I believe we use F= (K q1 q2/r^2). I've tried inserting different things into the formula but none of it gives me the answer I am looking for which is 1.57microNewtons