Dynamics concerns the analysis of objects that are accelerating as a result of acting forces. This indicates that the sum of all forces acting upon the object under investigation is not equal to zero. Dynamics can be divided into two main areas, kinetics and kinematics. Kinetics focuses on the study of forces that cause motion, such as gravity or torque, while kinematics focuses on the study of describing motion using quantities such as time, velocity, and displacement without the concern of the forces involved. Dynamics is important to Engineering Literacy, as it is the basis on which engineering professionals analyze physical systems that are in motion. For example, the application of dynamics enables professionals to solve problems where the forces are not in equilibrium by relating the forces and moments acting on a body to the resulting motion.