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## Homework Statement

Two tiny metal spheres A and B of mass mA = 3.40 g and mB = 3.90 g have equal positive charges q = 4.50 µC. The spheres are connected by a massless nonconducting string of length d = 1.00 m, a distance that is much greater than the radii of the spheres.

(a) What is the electric potential energy of the system?

__J

(b) Suppose you cut the string. At that instant, what is the magnitude of the acceleration of each sphere?

__m/s2 (Sphere A)

__m/s2 (Sphere B)

(c) A long time after you cut the string, what is the speed of each sphere?

__m/s (Sphere A)

__m/s (Sphere B)

## Homework Equations

V=U/q

V=-W/q

V=kq/r

U=kq/r^2

K=.5mv^2

## The Attempt at a Solution

My teacher told me to use conservation of energy and momentum.

a) U=kq^2/r

U=((9*10^9)(4.50 µ)^2/1

U=.18225 J

i dont understand part B-C