In physics, mechanics is concerned with the motion of objects when acted upon by forces. For historical reasons, classical mechanics is usually limited to descriptions based upon Newtonian physics (i.e., Newton's laws of motion). In contrast, quantum mechanics utilizes quantum theory to describe the behavior of subatomic particles. Classical mechanics also differs from statistical or relativistic mechanics. Statistical mechanics is concerned with large numbers of objects. Relativistic mechanics studies objects moving at velocities close to the speed of light, or whose kinetic energies are on the scale of the product of their masses and the square of the velocity of light (mc2 ). The subdivisions of mechanics include kinematics, which studies the movement of objects without explicit consideration of the forces responsible for the motion, and dynamics, which is concerned with the motion of moving objects and the forces and physical properties that affect them (e.g., mass...