# Electrostatic force of attraction between two particles

1. Jun 24, 2009

### Midgela25

The homework problem reads as follows:

A proton and an electron are held in place on the x axis. The proton is at x=-d, while the electron is at x=+d. They are released simultaneously, and the only force that affects their motions is the electrostatic force of attraction that each applies to the other. Which particle reaches the origin first?

2. Relevant equations

Newtons second law

3. The attempt at a solution

Without any provided numbers, wont they reach the origin at the same time?

2. Jun 24, 2009

### kyrax

im not an expert so im not 100% sure but.....

a=F/m

the forces acting on each other is equal but the masses are different.

the proton, which has a bigger mass, will have a slower acceleration

the electron, which has a smaller mass, will have a faster acceleration.

in my conclusion, i think the electron will reach the origin first. please correct me if im wrong

Last edited: Jun 24, 2009
3. Jun 24, 2009

### LowlyPion

Welcome to PF.

It would seem that kyrax has grasped the situation correctly.

4. Jun 24, 2009