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https://wug-s.physics.uiuc.edu/cgi/courses/shell/common/showme.pl?cc/DuPage/phys2112/spring/homework/Ch-24-E-Potential/2_pt_chrgs/set3p02.gif" [Broken]

Two positive charges, each with Q = +11 µC, are fixed to the x-axis at x = +a and x = -a, where a = 2 m.

(a) Find the electric potential at point A on the y-axis where (xA, yA) = (0, b) and b = 6 m. Take the zero of potential to be at infinity.

(b) A particle with charge q = -5 µC and mass m = 2.4 x 10-4 kg is released from rest at point A. Find its speed at the origin.

V=[tex]\sum[/tex]KQ/R

U=KQ

Part (a) can be solved by using potential equation

For part (b) the potential energy of the particle is conserved, so I've found it. after that i dont' know how to get to the velocity.

Thanks in advance.

**1.**

Homework StatementHomework Statement

Two positive charges, each with Q = +11 µC, are fixed to the x-axis at x = +a and x = -a, where a = 2 m.

(a) Find the electric potential at point A on the y-axis where (xA, yA) = (0, b) and b = 6 m. Take the zero of potential to be at infinity.

(b) A particle with charge q = -5 µC and mass m = 2.4 x 10-4 kg is released from rest at point A. Find its speed at the origin.

## Homework Equations

V=[tex]\sum[/tex]KQ/R

U=KQ

_{1}Q_{2}/R## The Attempt at a Solution

Part (a) can be solved by using potential equation

For part (b) the potential energy of the particle is conserved, so I've found it. after that i dont' know how to get to the velocity.

Thanks in advance.

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