Help Needed: Calculating Force Using Image Charges

AI Thread Summary
The discussion revolves around using image charges to calculate the force on a particle, with a specific formula provided by the user. The user expresses confusion about their calculations, particularly regarding the potential in a gray section and the placement of image charges. Clarification is requested on the significance of the variables in the formula. Participants emphasize the need for clear definitions of the symbols used in the calculations. The conversation highlights the importance of understanding the charge configuration and its impact on the force calculation.
adamp121
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Hi,

I'm trying to use image charges to find the force that apply on the following particle (on the attachment) , but it seems that I do something wrong -
F=2q^2/(2a^2)-2cos(60)q^2/a^2
The gray section have 0 potential, so I've tried to put image charges like it is in the second attachment file.
Can someone help me?

Thanks,
Adam
 

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  • temp2.jpg
    temp2.jpg
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Graphics can help. But you must descript all the letters significance.¡¡¡ We are physics, not engineerings
 
Sorry...
The upper and the lower charges are negative while the two middles are positive.
 
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