WORKING OF A CAR BRAKING SYSTEM
When the brake pedal is pressed by the driver, the piston in the master cylinder is pushed. This compresses the oil inside the tubes and the pressure is transmitted equally to the brake shoes by the caliper forcing the brake shoes and its pad against the brake drum to which the tyres are fixed. (The frictional force between the pad and the drum slows down the rotation of the wheels or can stop them entirely depending on how hard the driver pressed down on the pedals.) When the driver releases the brake pedal. The pressure is released. A spring connected to the two arms of the brake shoes which had been stretched by the force applied now returns, and pushed away from the drum giving clearance for the drum to rotate freely once again.
