# Physics: Electrostatic Forces question

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• Mar 5th 2009, 05:22 PM
xxlvh
Physics: Electrostatic Forces question
This question isn't really making any sense in my mind...
Here's the given diagram for the problem:
http://xs537.xs.to/xs537/09104/physics977.gif
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
• Mar 6th 2009, 07:26 AM
xxlvh
I meant to put that it should rather be south of west, my mistake.
• Mar 6th 2009, 08:42 AM
ADARSH
Don't you think there should be a negative sign (Thinking)
• Mar 6th 2009, 08:58 AM
xxlvh
Do you mean on the overall force?
• Mar 6th 2009, 01:12 PM
lanzailan
Quote:

Originally Posted by xxlvh
This question isn't really making any sense in my mind...
Here's the given diagram for the problem:
http://xs537.xs.to/xs537/09104/physics977.gif
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...
• Mar 6th 2009, 08:21 PM
ADARSH
Quote:

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..

Quote:

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 (Nod)
• Mar 6th 2009, 08:42 PM
xxlvh
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. =)