What is the function of the brake fluid in a car's brake system?

A. Converts the force from the brake pedal into hydraulic pressure
B. Applies pressure to the brake lining to slow down the car
C. Transmits pressure from the master cylinder to the wheel cylinders or calipers
D. Holds the car in place when it is parked

The brake fluid's primary function in a car's brake system is to transmit pressure from the master cylinder to the wheel cylinders or calipers. This hydraulic operation utilizes Pascal's principle, enabling efficient braking. As the fluid pressure increases, it activates the brakes to slow the vehicle down.

Explanation:

Function of Brake Fluid in a Car's Brake System

In a car's brake system, the primary function of brake fluid is to transmit pressure from the master cylinder to the wheel cylinders or calipers. This hydraulic system operates based on Pascal's principle, which states that pressure applied to a confined fluid is transmitted undiminished in every direction.

Here’s how it works:

When the driver pushes down on the brake pedal, the force exerted is transferred to the brake fluid in the master cylinder.
This pressure increase in the fluid is transmitted through the brake lines to the wheel cylinders or calipers.
The wheel cylinders then push the brake pads against the brake discs (or drums), thus slowing down the car.

This system allows for efficient braking while minimizing the force needed to engage the brakes, making it both effective and responsive.

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