![image](https://tex.z-dn.net/?f=F%3Dk%2A+%5Cfrac%7B+q_%7B1%7D%2A+q_%7B2%7D++%7D%7B+r%5E%7B2%7D+%7D+%3B%0A%3D%3E+F%3D+%5Cfrac%7B20%2A30%2A9%2A+10%5E%7B9%7D+%7D%7B+30000%5E%7B2%7D+%7D+%3B+%3D%3EF%3D+%5Cfrac%7B9%2A+10%5E%7B4%7D+%7D%7B15%7D+%3D0.6%2A+10%5E%7B4%7D+%3D6000H%3B+)
F= \frac{20*30*9* 10^{9} }{ 30000^{2} } ; =>F= \frac{9* 10^{4} }{15} =0.6* 10^{4} =6000H; " alt="F=k* \frac{ q_{1}* q_{2} }{ r^{2} } ;
=> F= \frac{20*30*9* 10^{9} }{ 30000^{2} } ; =>F= \frac{9* 10^{4} }{15} =0.6* 10^{4} =6000H; " align="absmiddle" class="latex-formula">
![F=6 F=6](https://tex.z-dn.net/?f=F%3D6)
кН