In Chap. 8, Newton’s second law of motion is presented in the form of “equations of motion.” In Chap. 10, the concepts of work and energy are introduced. Based on the same law, “work-energy” and “conservation of energy” methods are devised to facilitate the solutions of specific problems in kinetics. In this chapter, the concepts of linear momentum and impulse will be defined. Newton’s second law of motion will be reformulated to introduce other methods for kinetic analyses based on the “impulse-momentum theorem” and the principle of “conservation of linear momentum.” These methods will then be applied to analyze the impact and collision of bodies.