Question

determine o valor de duas cargas iguais distanciadas 24,6cm no vacuo, que se repelem com uma força de 250N

Answer 1

O valor das duas cargas é igual a $4,41.10^{-5} C$

Para calcular o valor das cargas, recorre-se à primeira Lei de Coulomb.

F = K.Q.Q / d²

$250 = 9.10^9.Q^2 / 0,246^2\\\\\\\\\250 = 9.10^9.Q^2 / 0,060516\\\\\\\\250 = 148,72.10^9,Q^2\\\\\\\\\Q^2 = 250 / 148,72.10^9\\\\\\\Q^2 = 1,68.10^-9\\\\\\\\\Q = \sqrt[2]{0,168}.10^{-8} \\\\\\\\Q = 4,41.10^-5 C (Aproximadamente)$.

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