Motion of Charged Particles in Electric Fields

AI Thread Summary
To determine the electric force on each charge in a rectangle with fixed charges at the corners, start by calculating the electric field produced by each charge at the center using the formula E = kQ/R, where k is Coulomb's constant, Q is the charge, and R is the distance from the charge to the center. The distances to the center from each corner charge are 0.3m, 0.4m, and 0.5m, which will help in calculating the individual electric fields. Next, find the vector sum of these electric fields to determine the total electric field at the center. Finally, use the electric field to calculate the electric potential at the center. Following these steps will guide you in solving the problem effectively.
soccerdude28
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Multiple Point Charges

Alright so the question is:
A charge of 1.2x10^-3C is fixed at each corner of a rectangle that is 30cm wide and 40cm long. What is the magnitude and direction of the electric force on each charge? What is the electric field and the electric potential at the centre?

I am NOT asking for the answer, i am asking for someone to help push me along the right path. I have researched this on the internet and read about it in my textbook. This is what i have come up with.
At each point, r1 = 0.3, r2 = 0.4, r3=0.5.
E = vector sum
And then use the equasion
E=KQ/R
not quite sure what to do at this point.
 
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bump please help!
 
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please help!
 
come on guys, just lead me down the right path
 
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