# Two charges of  -1 C  and  4 C  are at points  (-2 ,6,-8 )  and  ( 2,-4,1 ), respectively. Assuming that both coordinates are in meters, what is the force between the two points?

Electrostatic force between two charges is given by $\vec{F} = \frac{K {q}_{1} {q}_{2}}{r} ^ 3 \vec{r}$
Here$\vec{r} = 4 \hat{i} - 10 \hat{j} + 9 \hat{k}$
${q}_{1} = - 1 C , {q}_{2} = 4 C , K = 9 \times {10}^{9} S I u n i t s$