Question

Two charges of `-3 C` and `-2 C` are at points `(0,-1,8)` and `( -2,4,7)`, respectively. Assuming that both coordinates are in meters, what is the force between the two points?

Answer 1

`F=1,8.10^9 " N"`

Explanation:

`"The Point of A :"(0,-1,8)`
`"The Point of B :"(-2,4,7)`
`"distance between the point A and B:"`
`Delta r=sqrt((-2-0)^2+(4+1)^2+(7-8)^2)`
`Delta r=sqrt(4+25+1)" "Delta r=sqrt30 m`
`r^2=30`
`"The Electrical Force between two charges acting each other is given as:"`
`F=k*(q_1*q_2)/r^2`
`F=(9*10^9*(-3)*(-2))/30`
`F=(6*9*10^9)/30`
`F=1,8.10^9 " N"`