Odpowiedź :
q₁= +1 C
q₂= -1 C
r= 2 m
k=8,98745×10⁹ Nm²/C²
Siła Coulomba
[tex]F=k\frac{|q_1*q_2|}{r^2}=8,9875*10^9 \ [\frac{N \ m^2}{C^2}]*\frac{|1 \ [C]*(-1 \ [C])|}{(2 \ [m])^2}=8,9875*10^9 \ [\frac{N \ m^2}{C^2} ]*\frac{1 \ [C^2]}{4 \ [m^2]}=2,246875*10^9 \ N\approx2,2 \ GN[/tex]
[tex]dane;\\q_1 = +1 \ C\\q_2 = -1 C\\r = 2 \ m\\k = 9\cdot10^{9}\frac{N\cdotm^{2}}{C^{2}}\\szukane:\\F = ?[/tex]
Korzystamy z prawa Coulomba:
[tex]F = k\cdot\frac{|q_1\cdot q_2|}{r^{2}}\\\\F = 9\cdot10^{9}\frac{Nm^{2}}{C^{2}}\cdot\frac{|+1 \ C\cdot(-1) \ C|}{(2 \ m)^{2}}\\\\F = 9\cdot10^{9} \ N\cdot\frac{1}{4}\\\\F = 2,25\cdot10^{9} \ N = 2,25 \ GN[/tex]
[tex]1 \ kN = 10^{3} \ N\\1 \ MN = 10^{6} \ N\\1 \ GN = 10^{9} \ N[/tex]