1. Mar 10, 2010 #1

   mbenade

   

   In an equilateral triangle a positive point charge +q is located at each of the vertices. If a 4th charge is added at the midpoint between one of the sides could this charge be such that the force on it would be zero?

    

   mbenade, Mar 10, 2010
2. 
   Phys.org - latest science and technology news stories on Phys.org

   • • How community structure affects the resilience of a network
   • • The pho­to­elec­tric ef­fect in stereo
   • • CWI researchers make power grid more reliable with mathematics
3. Mar 10, 2010 #2

   tiny-tim

   

   Science Advisor

   Homework Helper

   Welcome to PF!
   
   Hi mbenade! Welcome to PF!
   

   What do you think?

    

   tiny-tim, Mar 10, 2010
4. Mar 10, 2010 #3

   dacruick

   

   I think everytime tiny tim decides to help someone through with a problem im going to come in behind him and tell the asker all the answers in some feeble and embarrassing attempt to steal his thunder. But hes right...what do you think

    

   dacruick, Mar 10, 2010
5. Mar 11, 2010 #4

   mbenade

   

   my first answer would be no because a forth charge would be needed to cancel out the force on the new point charge by the opposite pt charge, but Im not sure.

    

   mbenade, Mar 11, 2010
6. Mar 11, 2010 #5

   tiny-tim

   

   Science Advisor

   Homework Helper

   Hi mbenade!
   

   hmmm … yes, but not very scientific-sounding …
   
   

   Hint: do any of the charges cancel out (at that midpoint)? ​

    

   tiny-tim, Mar 11, 2010

• Log in with Facebook
• Log in with Twitter

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in