Answer:
It is based upon the principle of Pascal's law
Step-by-step explanation:
As we know by the Pascal's law that when we apply pressure at any point of the fluid then that applied pressure is transferred to all points of fluid equally without any change in all direction.
In hydraulic brake system it will be same that occurs in the system. When we push the brake pedal then the pressure is exerted into the brake oil inside it
This pressure is transmitted by the fluid in all directions without any change or without any loss.
Now this pressure is exerted at larger area then due to this it will exert large force as we know that
Force = (Pressure)(Area)
So The operation of hydraulic brakes in a car is based upon the Principle of Pascal's law.