Mechanics is a branch of physics that deals with the study of forces acting on matter and their effects on motion and equilibrium. It includes the subfields of statics, which studies objects at rest; kinematics, which analyzes motion without considering causes of motion; and dynamics, which considers forces that cause motion and changes in motion. Mechanics is one of the largest subjects in science and deals with topics like work, power, energy, and how forces affect the motion of objects.