# Homework Help: Electric Force

1. Aug 30, 2008

### StephenDoty

Two positive charges q0 at the origin and q1 at (0,d1,0) and one negative charge -q2 at (0,d2,0). What is the net force on particle 0 from particle 1 and 2? (See Picture CPartB inserted at bottom)

F on 0 due to 1 = kq0q1/d1^2 and since it is in the negative y direction since q1 repels q0 wouldn't F on 0 due to 1 = -kq0q1/d1^2 $$\hat{y}$$?

F on 0 due to 2 = kq0q2/d2^2 and since it is in the positive y direction since q2 attracts q0 wouldn't F on 0 due to 2 = kq0q2/d2^2 $$\hat{y}$$?

So wouldn't the net force = -kq0q1/d1^2 $$\hat{y}$$ + kq0q2/d2^2 $$\hat{y}$$? Would this be the way I type it into mastering physics?

Thank you for your help. I am having a difficult time figuring out how to input my answers in Mastering Physics.

Stephen

2. Aug 30, 2008

### Defennder

Yeah it's ok. I used this software 2 semesters as well as part of my online HW excercises but I can't remember how to enter input.

3. Aug 30, 2008

### StephenDoty

I would hate to lose points on a problem that I got correct just because I did not input the answer correctly into mastering physics. So if there is anyone who does know the syntax I would greatly appreciate any help.