Question

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?

Answer 1

Electrostatic force between two charges is given by `vecF=(Kq_1q_2)/r^3vecr`
Here`vecr=4hati-10hatj+9hatk`
`q_1=-1C,q_2=4C,K=9xx10^9SI units`
Now the force can be calculated...