Coulomb's Law, Rearranging Equation.

[Syncert]

Homework Statement

Two electrostatic point charges of +60 microCoulombs and +50 microCoulombs exert a repulsive force on each other of 175 N. What is the distance between the two charges?

Homework Equations

Fe=Kc (q1*q2/r^2)

The Attempt at a Solution

I know I need to rearrange the equation, to get r^2 over to the other side of the equation. Do I have to square root both sides to figure this out?

Fe=Kc (q1*q2/r^2)
*r^2 * r^2

Fe*r^2 = Kc (q1*q2)
/Fe /Fe

R^2=Kc*q1*q2/Fe

 

[tiny-tim]

Welcome to PF!

Hi Syncert! Welcome to PF!

(try using the X² and X₂ icons just above the Reply box )

I know I need to rearrange the equation, to get r^2 over to the other side of the equation. Do I have to square root both sides to figure this out?

Fe=Kc (q1*q2/r^2)
*r^2 * r^2

Fe*r^2 = Kc (q1*q2)
/Fe /Fe

R^2=Kc*q1*q2/Fe

Yes, that's fine …

R = √(Kc*q₁*q₂/F_e) ​

 

[Syncert]

Wow it was really that simple...thank you. =]