A 공 (ball) is a round object that is often used in various sports and games. It can be made from different materials, such as rubber, plastic, or leather, and comes in various sizes depending on its intended use. Common types of balls include soccer balls, basketballs, and tennis balls, each designed for specific activities. Balls are typically used for throwing, catching, kicking, or bouncing. They play a crucial role in many recreational activities and sports, promoting physical fitness and teamwork. In addition to sports, balls can also be used in toys and games for children, encouraging play and coordination.