What role does the master cylinder play in the braking system?

The master cylinder is a critical component in the hydraulic braking system of a vehicle, responsible for distributing brake fluid to the brake systems at each wheel. When the driver presses the brake pedal, the master cylinder converts the mechanical force from the pedal into hydraulic pressure. This hydraulic pressure then travels through brake lines to the brakes at each wheel, enabling them to engage effectively.

By distributing the brake fluid, the master cylinder ensures that the force applied when the brake pedal is pressed is transmitted uniformly to each of the brake assemblies, allowing for effective stopping power and consistent braking performance. This distribution is vital for maintaining vehicle control and safety during braking.

The other options describe functions that are not the primary role of the master cylinder. While the braking system does involve energy conversion and the application of force to brake pads, those actions are results of the hydraulic force generated by the master cylinder's operation. Storing brake fluid is also not the master cylinder's role; instead, it contains the fluid necessary for hydraulic operation but does not serve as a reservoir.