Why is there a rubbing sound coming from the car?

[SanEliana]

This situation may be caused by friction in the braking system. Here is relevant information: 1. Introduction: The braking system consists of a control system, hydraulic system, and power assist system. 2. Working principle: The principle of the braking system is to generate enormous friction, converting the vehicle's kinetic energy into thermal energy. As we all know, energy cannot be created or destroyed, but can only be transformed from one form to another or transferred from one object to another, with the total amount of energy remaining constant during the process of transformation or transfer. During acceleration, a car converts chemical energy into thermal and kinetic energy, while during braking, the braking system converts the car's kinetic energy into thermal energy and dissipates it into the air.