Pn Haziah bt Awang Lah, Sekolah Sultan Alam Shah. 2007

3.4 APPLYING PASCAL’S PRINCIPLE

It shows that ______________________________________________________________

Applications of Pascal’s Principle.

1. Automobile hydraulic lift

2. Hydraulic brake system

TEACHER’S SIGNATURE : …………………………50

Pascal’s Principle : …………………………………………………………………………………….

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Water flow with the same speed because

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Reminder :Pascal’s Principle is used for a fluid in enclosed container.

From , P = ; F = PA

F1 = 20 NA1 = 4 cm2 A2 = 12 cm2

Pn Haziah bt Awang Lah, Sekolah Sultan Alam Shah. 2007

Solving Problem.

1. Figure below shows a hydraulic jack which is used for lifting a car at a service centre for motor vehicles. The hydraulic jack made up of two pistons x and Y of cross-sectional area 0.02 m2 and 18 m2 respectively. When the compressor is switched on, a force of 200 N acts on piston X.

(a) Name the physics principle applied in the hydraulic jack.

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(b) Explain how the car is lifted

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(c) State two advantages of using oil as the hydraulic fluid of water.

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(d) Calculate the pressure exerted on piston Y.

(e) Calculate the maximum weight of a load that can be lifted by piston Y.

(f) If piston X move down by 45 cm, what is the distance moved by piston Y?

TEACHER’S SIGNATURE : …………………………51