Gladistshiala267
13.12.2021 •
Physics
After the ribbon is cut, there is a point where the spring is relaxed (not stretched or compressed). What form is the system's energy in at that point?
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Ответ:
where
ke is the Coulomb's constant
Q is the value of the charge
r is the distance of the point at which we calculate the field from the charge (so, in this problem, r=15.0 cm=0.15 m).
Let's calculate the electric field generated by the first charge:
While the electric field generated by the second charge is
Both charges are positive, this means that both electric fields are directed toward the charge. Therefore, at the point midway between the two charges the two electric fields have opposite direction, so the total electric field at that point is given by the difference between the two fields: