1. The problem statement, all variables and given/known data a mass m is attached by a massless rod of length l to a pivot , which allowes swing freely in a vertical plane under the influence of gravity .let the anglethita betweenthe rod the vertical . find the energy levels of the system? find the lowest -order correction to the ground state energy with small angle? 2. Relevant equations 3. The attempt at a solution if i can solve it classically first and then find the energy from schrodenger eqn , but i'm not sure if the hamiltonain work in this case????