1. A method for controlling an electric motor for driving a motor vehicle with the aid of a drive train, comprising: measuring a rotation angle of a rotor of the electric motor multiple times; detecting a physical behavior of at least one of the electric motor, the drive train, and the motor vehicle, in a physical model; ascertaining at least one of an angular velocity and an angular acceleration, of the rotor as a function of the detected rotation angle, at least one of the rotation angle, the angular velocity, and the angular acceleration being ascertained from measured values of the rotation angle of the rotor using the physical model; and at least one of controlling and regulating energization of electromagnets of a stator of the electric motor, the energization of electromagnets of the stator of the electric motor being carried out as a function of at least one of the rotation angle, the angular velocity, and the angular acceleration ascertained using the physical model; wherein the physical model is a dual-mass oscillator having a first mass as the electric motor, a second mass as the motor vehicle and a torsion bar spring as the drive train between the first mass and the second mass.