Work to move charge to infinity?

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SUMMARY

The discussion centers on calculating the work required to move a +2.7-µC charge to infinity in a rectangular configuration of charges. The relevant equation used is W = ΔV * q, where ΔV represents the potential difference and q is the charge. The user initially struggled with determining the potential (V3) due to the lack of a reference point for distance (r). Ultimately, the user resolved the issue by finding the potentials, indicating a successful understanding of the problem.

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awertag
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Homework Statement



The figure below shows three charges at the corners of a rectangle of length x = 0.55 m and height y = 0.35 m.

http://www.webassign.net/walker/20-23alt.gif

(a) How much work must be done to move the +2.7-µC charge to infinity?

Homework Equations



W=(\DeltaV)(q)
V3=potential at the spot of the charge
Q3=2.7e-6 C

The Attempt at a Solution



W=/\VQ
W=V3(Q3)
then try to solve for V3=KQ3/r3 but i know i can't because i don't have an r because there's no reference point for it. So, is there another way to solve for potential or am i just going about the whole thing wrong?

thanks very much

--aweg
 
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hi awertag! :smile:

(have a delta: ∆ and try using the X2 and X2 icons just above the Reply box :wink:)

the work done against two (or more) forces is the sum of the work done against each force …

∫(∑F).d = ∑(∫F.d) :wink:​
 
haha thanks for the delta :)
i actually got the problem, i just was having trouble finding the potentials but I've got it now. Thank you for taking the time to respond, and have a great day!
 

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