Imagine a universe in which, like in ours, there are two kinds of charges (positive and negative), with the like charges repelli
1 answer:
Answer:
the static charge is not always distributed on the surface of the conductor, there are also charges in the volume but of lesser magnitude
Explanation:
In this hypothetical system the electric force is of type
F =
in this case the force decays to zero much faster,
if we call Fo the force of Coulomb's law
F₀ =
assuming the constant k is the same
the relationship between the two forces is
F / F₀ = 1 / r
F = F₀ / r
when analyzing this expression the force decays much faster to zero.
In an electric conductor, charges of the same sign may not feel any repulsive force from other charges that are at a medium distance, so there is a probability that some charges are distributed in the volume of the material, this does not happen with coulomb's law
Consequently, the static charge is not always distributed on the surface of the conductor, there are also charges in the volume but of lesser magnitude
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A) 5000 N/m
The force constant of the spring can be found by using the expression for the elastic potential energy stored in the spring (which is equal to the work done on it):
where
k is the spring constant
x is the stretching/compression of the spring
In this problem, we have
W = 16.0 J is the work done
x = 8.00 cm = 0.08 m is the stretching
Substituting into the formula and re-arranging it, we find
B) 400 N
The magnitude of the force needed to stretch the spring by x = 8.00 cm = 0.08 m is given by Hook's law:
where k=5000 N/m as we found previously. Substituting x=0.08 m, we find:
C) 4 J
The work done to compress the spring by x=4.00 cm=0.04 m is given by the same formula used for part A:
where in this case, k=5000 N/m and x=0.04 m. Substituting, we find
D) 200 N
As we did in part B), the force needed to stretch this distance is given by Hook's law:
where in this case, k=5000 N/m and x=0.04 m. Substituting, we find