Kinetic energy of an orbiting electron (Bohr Model)

Thread Starter


Joined Dec 12, 2012
I have to find the orbital kinetic energy of an electron around a single proton. I solved for Potential energy via U=qv (test charge times voltage).

For kinetic energy, I feel like this should be identical to a physics 1 satellite question involving kinetic energy, where I must find the velocity at which the centripetal force matches the attractive force between the charges. From there solving for kinetic energy is simply a matter of plugging the mass and velocity into the equation.

I'm having trouble mathematically expressing the attractive force as equal to the centripetal force.

I am attempting to take the force= Electric field x test charge, so kQ(proton)/r^2 x q(electron)
and match it to

Am I on the right track here conceptually?


Joined Nov 9, 2007
Yes you are on the right lines but check again in your other thread, your understanding of signs.

Post some equations for us to discuss.