Question

A charge of `2 C` is at `(1,4 )` and a charge of `-1 C` is at `2 ,-5)`. If both coordinates are in meters, what is the force between the charges?

Answer 1

`F~=0,22*10^9" "N`

Explanation:

`bar (AB)=sqrt(9^2+1^2)=sqrt82" "m`
`"Force between two charges is given by Coulomb's law"`
`F=(k*q_1*q_2)/d^2=(9*10^9*2*(-1))/82=-(18*10^9)/82`
`F~=0,22*10^9" "N`