A stopping device is a device used to slow or stop the motion of a vehicle, machine, or other object. The most common type of stopping device is a BRAKE, which is a mechanical device that works by applying friction to the wheels of a vehicle in order to slow it down or bring it to a complete stop. Brakes are typically operated by pressing a pedal or lever, and are found on all types of vehicles, from cars and motorcycles to bicycles and airplanes.