Point Charge Problem: Find Force Magnitude & Direction

[PetetheGreek]

Homework Statement

Three identical point charges of 2.0x10-6C are placed on the x-axis. The firs charge is at the origin, the second to the right at x= 50cm, and the third is at 100 cm mark. What are the magnitude and direction of the electrostatic force which acts on the charge at the origin?

Homework Equations

Coulombs Law

The Attempt at a Solution

I'm coming up with 0.36N to the right but I'm not sure if it's right.

 

[Hootenanny]

Homework Statement

Three identical point charges of 2.0x10-6C are placed on the x-axis. The firs charge is at the origin, the second to the right at x= 50cm, and the third is at 100 cm mark. What are the magnitude and direction of the electrostatic force which acts on the charge at the origin?

Homework Equations

Coulombs Law

The Attempt at a Solution

I'm coming up with 0.36N to the right but I'm not sure if it's right.

I have something different. If you showed your working, perhaps we could point out where you've gone wrong.

 

[PetetheGreek]

i have something different. If you showed your working, perhaps we could point out where you've gone wrong.

(9e9)(2.0e-6)(2.0e-6)/(.1)² = 0.36 and since its positive it goes to the right

 

[harvellt]

well if they have the same charge they shouldn't be attracted to one another...