Results 1 to 7 of 7

Math Help - Physics: Electrostatic Forces question

  1. #1
    Member
    Joined
    Dec 2007
    Posts
    137

    Exclamation 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
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Member
    Joined
    Dec 2007
    Posts
    137
    I meant to put that it should rather be south of west, my mistake.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Like a stone-audioslave ADARSH's Avatar
    Joined
    Aug 2008
    From
    India
    Posts
    726
    Thanks
    2
    Don't you think there should be a negative sign
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Member
    Joined
    Dec 2007
    Posts
    137
    Do you mean on the overall force?
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Junior Member lanzailan's Avatar
    Joined
    Mar 2009
    Posts
    27
    Quote Originally Posted by xxlvh View Post
    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...
    Attached Thumbnails Attached Thumbnails Physics: Electrostatic Forces question-image302.jpg  
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Like a stone-audioslave ADARSH's Avatar
    Joined
    Aug 2008
    From
    India
    Posts
    726
    Thanks
    2
    Quote Originally Posted by lanzailan View Post
    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
    Follow Math Help Forum on Facebook and Google+

  7. #7
    Member
    Joined
    Dec 2007
    Posts
    137
    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. =)
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. 2D physics forces for circular objects
    Posted in the Algebra Forum
    Replies: 0
    Last Post: March 5th 2012, 04:14 PM
  2. physics forces
    Posted in the Math Topics Forum
    Replies: 2
    Last Post: June 29th 2009, 11:25 PM
  3. Physics Forces Question
    Posted in the Math Topics Forum
    Replies: 2
    Last Post: January 25th 2009, 11:29 AM
  4. physics help please, FORCES WORKING TOGETHER.
    Posted in the Math Topics Forum
    Replies: 1
    Last Post: April 2nd 2008, 10:09 AM
  5. physics w/ Forces
    Posted in the Math Topics Forum
    Replies: 1
    Last Post: October 26th 2007, 07:23 AM

Search Tags


/mathhelpforum @mathhelpforum