(a) A light particle of mass m orbits in a circular orbit around a massive attractive centre with a potential that is given by
V(r) = Cr^2
(b) Using the equations for circular motion show that the total energy of such a particle must be given by
E = 2Cr^2
Use the Bohr postulate for the quantization L = mvr = nh(bar) in combination with the answer to part (a) to arrive at an expression for the energy associated with the allowed orbits in terms of the mass of the particle n and other constants.
I have no idea how to even begin this!
ANY help would be deeply appreciated!