When pressure is applied on the lever, it pulls a metal string which squeezes the two callipers together causing friction between the rubber pads and the metal rim on the tyre.
When your brake pads apply pressure to the rotor, which is directly connected to each wheel. This pressure creates the friction needed to slow or stop your vehicle.
The brake shoe carries the brake lining, which is riveted or glued to the shoe. When the brake is applied, the shoe moves and presses the lining against the inside of the drum.
The wheel cylinder is a part of the brake drum assembly. Its job is to press the brake shoes against the brake drum. This creates the friction needed to slow your vehicle.
The brake master cylinder is the first component in a vehicle's braking system, activated by depressing the brake pedal.