Speed is a fundamental concept in physics that measures how fast an object moves. It is defined as the distance traveled per unit of time, typically expressed in meters per second (m/s) or kilometers per hour (km/h). Understanding speed is crucial in various fields, from engineering to sports, as it affects performance and safety. In everyday life, speed influences how we travel, whether by car, bike, or on foot. For instance, automobiles are designed to reach high speeds, impacting traffic regulations and safety measures. Additionally, athletes often train to improve their speed, showcasing the importance of this concept in both competitive and recreational activities.