Final Answer:
In a drum brake system, brake shoe linings are pressed against the inner surface of the brake drum when brakes are applied. In a disc brake system, brake pads are squeezed against both sides of a rotating disc (rotor) to generate friction and slow down the wheel.
Step-by-step explanation:
1. Drum Brake System:
- In a drum brake system, the braking mechanism is housed within a circular drum attached to the wheel. Inside the drum, there are stationary components called brake shoes. These brake shoes have friction linings on their inner surfaces.
- When you apply the brakes, hydraulic pressure is used to push the brake shoes outward against the inner surface of the brake drum. The friction between the brake shoe linings and the drum creates resistance, slowing down and eventually stopping the rotation of the wheel.
2. Disc Brake System:
- In a disc brake system, the braking components are located near the wheel hub. Instead of brake shoes, this system uses brake pads. Brake pads are flat plates with friction material on one side.
- When the brakes are applied, hydraulic pressure forces the brake caliper to squeeze the brake pads against both sides of a rotating disc, commonly known as a rotor. The friction between the brake pads and the disc generates the necessary force to slow down or stop the rotation of the wheel.
- Disc brakes are often favored for their better heat dissipation and overall improved performance, particularly in more demanding driving conditions.
In summary, both drum and disc brake systems use friction to convert kinetic energy into heat energy, ultimately slowing down the vehicle. The specific components and their interactions, however, differ between the two systems.