Electric Force Calculation for Particle 2

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SUMMARY

The discussion centers on calculating the electric force acting on particle 2 due to particles 1, 3, and 4. The user correctly applied Coulomb's Law, represented as F2 = F21 + F23 + F24, where F21, F23, and F24 are calculated using the formula Kq1q2/d^2, with K being Coulomb's constant. The user encountered issues with the sign of the final answer, indicating confusion over whether the resultant force should be negative or positive. Proper unit conversion to meters is emphasized as a critical step in the calculations.

PREREQUISITES
  • Coulomb's Law for electric force calculation
  • Understanding of unit conversion, specifically to meters
  • Basic principles of vector addition in physics
  • Knowledge of charge interactions (positive and negative charges)
NEXT STEPS
  • Review the application of Coulomb's Law in multi-particle systems
  • Study vector addition techniques for forces in physics
  • Learn about the implications of charge signs on force direction
  • Practice problems involving electric forces and unit conversions
USEFUL FOR

Students studying physics, particularly those focusing on electrostatics, as well as educators looking for examples of electric force calculations and common pitfalls in problem-solving.

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 positive.
 

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