Mechanics 2 corresponds to unit M2. It covers motion of a projectile, equilibrium of a rigid body, uniform motion in a circle, Hooke's law and linear motion under a variable force. Written to match the contents of the Cambridge syllabus. Mechanics 2 corresponds to unit M2. It covers motion of a projectile, equilibrium of a rigid body, uniform motion in a circle, Hooke's law and linear motion under a variable force.