- #1

kno

- 3

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- Homework Statement
- Three point-like charges are placed at the corners of a rectangle as shown in the figure, a = 22.0 cm and b = 54.0 cm. Find the minimum amount of work required by an external force to move the charge q1 to infinity. Let q1= +3.00 µC, q2= −3.30 µC, q3= −3.60 µC.

- Relevant Equations
- W = -(EPE final - EPE initial)

W = -q * (V final - V initial)

This is the figure for the problem:

1.) Solved for initial total EPE of the system

EPE system = (kq2q3/a) + (kq2q1/b) + (kq1q3/√a^2 + b^2)

2.) Solved for final EPE of the system negating q1 as if it were off to infinity

EPE system final = (kq2q3/a)

3.) Plugged values into equation

W = -(EPE final - EPE intial)

I wasn't sure how to figure out the minimum work required, I think I am missing a step or two.

EPE system = (kq2q3/a) + (kq2q1/b) + (kq1q3/√a^2 + b^2)

2.) Solved for final EPE of the system negating q1 as if it were off to infinity

EPE system final = (kq2q3/a)

3.) Plugged values into equation

W = -(EPE final - EPE intial)

I wasn't sure how to figure out the minimum work required, I think I am missing a step or two.