Question

What is the force, in terms of Coulomb's constant, between two electrical charges of `-4 C` and `19 C` that are `12 m` apart?

Answer 1

`F=-6.156*10^12N`

Explanation:

`F=k*(q_1*q_2)/d^2`

`k=9.10^9 " "N*m^2*C^(-2)`

`q_1=-4C`

`q_2=19C`

`d=12" "m`

`F_1=-F_2=F`

`F=9.10^9((-4)*19)/12^2`

`F=-(9*10^9*cancel(4)*19)/cancel(144)`

`F=-9*36*19*10^9`

`F=-6156*10^9`

`F=-6.156*10^12N`