Mechanical brakes are devices used to slow down or stop the motion of a vehicle or machine. They work by applying friction to a rotating part, such as a wheel or disc, which converts kinetic energy into heat. Common types of mechanical brakes include disc brakes and drum brakes, each utilizing different mechanisms to create this friction. These brakes are typically operated by a pedal or lever that the user engages. When activated, the brake pads or shoes press against the rotating surface, effectively reducing speed. Mechanical brakes are widely used in various applications, including automobiles, bicycles, and industrial machinery.