Question

A charge of `-2 C` is at `(-6, 4 )` and a charge of `-1 C` is at `( -2 , 7)`. If both coordinates are in meters, what is the force between the charges?

Answer 1

`F=72*10^7 N`

Explanation:

`r^2=(-2+6)^2+(7-4)^2`
`r^2=16+9`
`r^2=25" distance between two point"`
`F=(k*q_1*q_2)/(r^2)`
`" Coulomb's law to compute force between two charges"`
`F=(9*10^9*(-2)*(-1))/25`
`F=(2*9*19^9)/25`
`F=0,72*10^9`
`F=72*10^7 N`