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How much work is done. Physics problem

by xswtxoj
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Feb14-09, 12:17 AM
P: 87
1. The problem statement, all variables and given/known data

1. A +38 uC charge is place @ 41cm from an identical +38uC. If assuming the potential identity is 0. whats the potential midway btw the 2 charges?
2. How much work is done to move a 0.40 uC charge from a point midway between the charge to a point 10 cm closer to either of the charges?

2. Relevant equations

V= m/q ?
F= Ke qq/r

3. The attempt at a solution
Not sure where to start but....
8.99e-19(38e-6)(q3)/(.041m-x )^2
8.99e-19(38e-6)(q3)/(x )^2
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Feb14-09, 12:28 AM
HW Helper
P: 5,341
Simply calculate the ΔV because that times q is your work.
Feb14-09, 12:32 AM
P: 87
so i used V= Ke q/r?

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