# Two charges of  -1 C  and  2 C  are at points  (-9,0,8)  and  ( 3,-6,7), respectively. Assuming that both coordinates are in meters, what is the force between the two points?

Feb 13, 2016

dist(r) = sqrt((x_1-x_2)^2+(y_1-y_2)^2+(z_1-z_2)^2
${r}^{2}$ will be 181 ${m}^{2}$ . Then apply following formula to calculate
$F = \frac{1}{4 \pi \epsilon {r}^{2}} q Q$