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## Homework Statement

Two positive charges, each with Q = +12 µC, are fixed to the x-axis at x = +a and x = -a, where a = 2 m.

Part A was not a poblem to find.

(a) Find the electric potential at point A on the y-axis where (xA, yA) = (0, b) and b = 5 m. Take the zero of potential to be at infinity.

V(A) = 40065.62617V

(b) A particle with charge q = -6 µC and mass m = 1.5 x 10-4 kg is released from rest at point A. Find its speed at the origin.

V at the origin = ???

## Homework Equations

F= ma

V(a)-V(b) = ∫E•dl = kQ/r

w = 0.5*m*(v

_{1}^2 - v

_{0}

**^2) = F•d**

potential energy = kq

3. The Attempt at a Solution

potential energy = kq

_{1}q_{2}/r3. The Attempt at a Solution

I think I have the equations I need for this problem. For this problem do I need to find a way to relate work to the potential energy?