👉 In physics, a cocket is a device used to propel an object in a straight line. It typically consists of a propeller attached to a shaft or motor that spins at high speed and provides thrust for propulsion. The propeller's design varies depending on its purpose and intended use (e.g., for aircraft, boats, or submarines). Cockets are often used for purposes such as navigation, surveillance, or other tasks requiring the ability to propel an object rapidly.