Josh930
Sep16-09, 10:32 AM
1. The problem statement, all variables and given/known data
Three equal point charges, each with charge 1.35 \mu C, are placed at the vertices of an equilateral triangle whose sides are of length 0.350 m. What is the electric potential energy U of the system? (Take as zero the potential energy of the three charges when they are infinitely far apart.)
2. Relevant equations
U=k(Qq/r)
3. The attempt at a solution
should i just find the U for each pair and then just multiply it by the number of possible pairs since the distances and charges are all equal? my answer = .138J
Three equal point charges, each with charge 1.35 \mu C, are placed at the vertices of an equilateral triangle whose sides are of length 0.350 m. What is the electric potential energy U of the system? (Take as zero the potential energy of the three charges when they are infinitely far apart.)
2. Relevant equations
U=k(Qq/r)
3. The attempt at a solution
should i just find the U for each pair and then just multiply it by the number of possible pairs since the distances and charges are all equal? my answer = .138J