Answer :
Final answer:
The 'emergency brake' referenced in the question is the Parking Brake, a mechanical system employing cables and levers to engage the rear brakes independently of the hydraulic brake system, typically used when parking on inclines to prevent the vehicle from rolling.
Explanation:
The brake described in the question is known as the Parking Brake. The Parking Brake, also referred to as the emergency brake, is a mechanical system that uses cables and levers to engage the rear brakes. This system is separate from the main hydraulic brake system and can be used in case the latter fails. When a driver activates the parking brake, it mechanically applies force to the rear brakes, ensuring the vehicle does not roll when parked on a hill or slope.
On the other hand, the main brake system of a vehicle generally consists of components like a disc brake, which includes a brake disc, a caliper, and brake pads. The main braking force comes from hydraulic pressure applying the brake pads against the rotor, utilizing Pascal's principle, where pressure exerted on a fluid is distributed equally throughout the fluid.
