Question

Two charges of `-1 C` and `5 C` are at points `(1,-5,3 )` and `( -3 , 9, 1 )`, respectively. Assuming that both coordinates are in meters, what is the force between the two points?

Answer 1

`F=-2,12264*10^8N`

Explanation:

`Delta x=-3-1=-4`
`Delta y=9-(-5)=14`
`Delta z=1-1=0`
`r=sqrt Delta x^2+ Delta y^2 +Delta z^2`
`r=sqrt 16+196+0`
`"distance between two charges is:"`
`r=sqrt 212`
`r^2= 212`
`F=k*(q_1*q_2)/r^2`
`F=9*10^9(-1*5)/212`
`F=(-45*10^9)/212`
`F=-2,12264*10^8N`