Here's the question: "How much work must be done to bring three electrons from a great distance apart to within 1.0 x 10^-10 m from each other?"(adsbygoogle = window.adsbygoogle || []).push({});

Here's what I did :

.(work to bring one to another)

Work = PE + KE

= PE + 0

=q(V final - V initial) ; V initial = 0

=qV final

=q(KQ/r)

= (1.6 x 10^-19)((9 x 10^9 x 1.6 x 10^-19)/(1.0 x 10^-10))

= 2.3 x 10^-18 J

.(work to bring the other one)

Work = q(KQ/r)

= (1.6 x 10^-19)((9 x 10^9 x 1.6 x 10^-19)/(2 x 1.0 x 10^-10))

= 1.2 x 10^-18 J

. I then add them together to get the total work done

(2.3 x 10^-18 J) + (1.2 x 10^-18 J)

= 3.4 x 10^-18 J

Now, is that right? Feel free to correct me.

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# Electric Potential/Energy question

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