# Thread: Physics: Electrostatic Forces question

1. ## Physics: Electrostatic Forces question

This question isn't really making any sense in my mind...
Here's the given diagram for the problem:

It asks you to determine the distance between B and C if the net electrostatic force on B is 78.9 N at 64.4 degrees north of east.
Wouldn't A be attracting B, while C would be repelling it, so the net force should rather be south of east?
If anyone could explain to me how it's north of east it would help me out a lot! Thanks

2. I meant to put that it should rather be south of west, my mistake.

3. Don't you think there should be a negative sign

4. Do you mean on the overall force?

5. Originally Posted by xxlvh
This question isn't really making any sense in my mind...
Here's the given diagram for the problem:

It asks you to determine the distance between B and C if the net electrostatic force on B is 78.9 N at 64.4 degrees north of east.
Wouldn't A be attracting B, while C would be repelling it, so the net force should rather be south of east?
If anyone could explain to me how it's north of east it would help me out a lot! Thanks
based on my understanding, B will attract A, while it repel C away...
and the net force should be north of east. please refer attachment...

6. Originally Posted by lanzailan
based on my understanding, B will attract A, while it repel C away...
and the net force should be north of east. please refer attachment...
This is completely wrong as the force on A or C have got nothing to do with force on "B" however what xxlvh said is correct..

Do you mean on the overall force?
I meant that the term 78.9 N in your question should be negative
,if its not that I think its wrong the direction you have given is correct

7. Alright, thanks for confirming my suspicions, I don't think it will affect the distance which the problem is asking for but it was bugging me. =)