The function of brakes is to slow the rotation of the wheels via hydraulic system.
Operation of Brakes
Brakes are activated when the brake pedal is pressed down, creating an evenly distributed pressure build up in the brake fluid lines through the master cylinder and slave cylinder. This forces the pistons out to apply the brakes. Depending on the type of braking system the vehicle has, either 1 of 2 things will happen;
The brakes pads will clamp on to the brake disc rotor.
The shoes will move further apart to push against the brake drums.
More InfoCalipers: Essentially a caliper sits like a clamp over the brake rotor. Calipers each hold a set of brake pads (inner & outer) that make contact with the rotors when the brakes are applied to create friction and slow the rotation.Disc Rotors: Rotors are made of two iron discs connected by ribs. Rotors are designed to absorb the intense heat that is created by the friction when the brake pads are applied.Brake Pads: Brake pads sit between the caliper and the rotor, controlled by the caliper. If the car tends to pull to one side or makes a squealing noise when the brakes are applied, this can indicate the brake pads may be worn and due for replacement.Brake Drums: Drums has a very similar role to the rotors in the sense that they work with the shoes as a friction pair. Drums absorb and disperse the heat crated by the friction when slowing the wheel rotation.Brake Shoes: Shoes house the brake linings and create friction when pushed against the brake drums once the brakes are applied. The heat from the friction is dispersed by the drums as the wheel rotation slows.