Pressure in the Fluid (3)

Science

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Use of hydraulic brake

Used to slow down or stop wheeled vehicles such as moving cars

Operation of hydraulic brake system

Operation of hydraulic brake system (1)

The brake pedal is pressed to push in the master cylinder piston to exert pressure on the brake oil

Operation of hydraulic brake system (2)

This pressure is transmitted uniformly by the brake oil through the metal pipes to the brake cylinders of the front and back wheels

Operation of hydraulic brake system (3) (i)

This pressure pushes the piston in the brake cylinder which presses the brake pad onto the steel plate in the disc brake

Operation of hydraulic brake system (3) (ii)

This pressure pushes the piston in the brake cylinder which presses the brake shoe onto the brake lining on the drum brak

Operation of hydraulic brake system (4) (i)

The frictional force between the brake pad and the steel plate slows down or stops the rotation of the front wheels

Operation of hydraulic brake system (4) (ii)

The frictional force between the brake lining and the brake drum slows down or stops the rotation of the back wheels

Bernoulli’s principle

When the fluid flows through the narrow part, its velocity increases and the pressure in that region decreases

A Venturi tube

Is a non-uniform tube with a narrower centre

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