Rotating devices are mechanical systems that convert energy into rotational motion. Common examples include motors, gears, and pulleys. These devices are essential in various applications, from household appliances to industrial machinery, enabling efficient movement and power transmission. The basic principle behind rotating devices is the use of a central axis around which components turn. This rotation can generate force, change direction, or increase speed. Understanding how these devices work is crucial in fields like engineering and robotics, where precise movement and control are necessary for functionality and performance.