A linear actuator is a device that creates motion in a straight line, as opposed to rotational motion. It converts energy, often electrical, into linear movement, making it useful in various applications such as robotics, manufacturing, and automation. Linear actuators can be powered by different sources, including electric motors, hydraulic systems, or pneumatic systems. These devices are commonly used in machinery and equipment where precise positioning is required. For example, they can be found in 3D printers, automated doors, and industrial machinery. Their ability to provide controlled movement makes them essential in modern technology and engineering.