The type of energy associated with an object in motion is called kinetic energy. This energy depends on both the mass and speed of the object, expressed mathematically as KE = 1/2 mv², where m is mass and v is velocity. Kinetic energy is a fundamental concept in physics and is essential in various applications, from simple mechanical systems to complex dynamics in engineering and transportation. Understanding kinetic energy helps in analyzing motion, predicting impacts, and studying energy conservation in systems.