At what distance from 4 x 10^-6 charge is the 2.3 gram mass with 6 x 10^-6 charge in equilibrium? The angle of frictionless incline is 28 degrees. There's a diagram but I don't know how to post it. I'm not sure what formula to use to solve this problem.

Question

At what distance from 4 x 10^-6 charge is the 2.3 gram mass with 6 x 10^-6 charge in equilibrium? The angle of frictionless incline is 28 degrees. There's a diagram  but I don't know how to post it. I'm not sure what formula to use to solve this problem.

anonymous · Answer

you can attach this file

anonymous · Answer

I don't know the diagram, but I guess you have to use the Coulomb's law and the Newton's law of universal gravitation and set both to be equal (but take into account the incline).

anonymous · Answer

(The force between to charges is described by the first law, between masses by the latter one.)