The function of the vehicle brake system is to slow down or stop the vehicle by converting kinetic energy into heat energy through friction. When the driver presses the brake pedal, hydraulic pressure is applied to the brake calipers or wheel cylinders, causing the brake pads or shoes to press against the brake rotors or drums. This action creates friction, which slows down the rotation of the wheels, ultimately bringing the vehicle to a halt. The brake system is crucial for safety, allowing drivers to control their speed and stop effectively, especially in emergency situations. Regular maintenance and inspection of the brake system are essential to ensure optimal performance and safety on the road.