Find the force acting on the charge at the origin

  • Thread starter pat666
  • Start date
  • #1
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Homework Statement


Three charges are fixed in the x-y plane as follows: 1.6nC at the origin (0, 0); 2.6nC at (0.55 , 0); –2.1 nC at (0, 1.15 ).

Find the force acting on the charge at the origin.
Express your answers using two significant figures. Enter the x and y components of the force separated by a comma.

Homework Equations


F=kQQ/r^2


The Attempt at a Solution


Fx=(2.6E-9*1.6E-9*9E-9)/1.15^2=1.24*10^-25N
Fy=(2.1E-9*1.6E-9*9E-9)/0.55^2=2.29*10^-26N
This is wrong but i cant see why??
 

Answers and Replies

  • #2
rl.bhat
Homework Helper
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For Fx r is 0.55 m not 1.15 m. And k = 9*10^9
 
  • #3
709
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thanks rl.bhat I have the right answers now. I just dont know which one would be negative, I am thinking Fy??? thanks
 

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