Electric Force Calculation for Particle 2

AI Thread Summary
The discussion focuses on the calculation of electric forces acting on particle 2 due to particles 1, 3, and 4. The user successfully solved the first part of the problem but struggles with the second part, unsure of where the error lies in their calculations. They have attempted both positive and negative values for the final answer but continue to receive incorrect results. The forum participants emphasize the importance of converting distances to meters and suggest reviewing the calculations for each force component. Clarification on whether the final answer should be negative or positive remains unresolved.
Zythyr
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Homework Statement



http://img155.imageshack.us/img155/5661/q2gf2.jpg

The Attempt at a Solution



I got the first part of the question correct but for some reason I can't get the second one. I know I did it correctly but its not working.

All the forces acting on particle 2 are from particle 1, 3, and 4. I calculated the forces and added them up but I still am not getting the right answer. I tried both negative and positive answer for the same number and still it says I am wrong.
 
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you have still not said anything about the results of your procedures. Then how can we tell you where you did wrong?
 
F2 = F21 + F23 + F24

F21 = Kq1q2/d^2 (convert d to meters first)
F23 = Kq2q3/d^2 (convert d to meters first)

F24 = Kq2q4/(2*d)^2 (convert d to meters first)

Also I am not sure if the final answer is suppose to be negitive or postive.
 

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