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lodovico
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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 Ji don't understand part B-C