Lesson 11

Pressure in liquids — Hydraulics

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This lesson contains 16 slides, with text slides.

Lesson duration is: 45 min

Items in this lesson

Pressure in liquids — Hydraulics

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Recap

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What do we know about this system?

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What do we know about this system?

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What do we know about this system?

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What do we know about this system?

Fluids are incompressible

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What do we know about this system?

Fluids are incompressible

P^{​ 1 ​ ​} = P^{​ 2 ​ ​}

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What do we know about this system?

Fluids are incompressible

P^{​ 1 ​ ​} = P^{​ 2 ​ ​}

\frac{​ F ^{​ 1 ​ ​} ​ ​}{​ A ^{​ 1 ​ ​} ​} = \frac{​ F ^{​ 2 ​ ​} ​ ​}{​ A ^{​ 2 ​ ​} ​}

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What do we know about this system?

Fluids are incompressible

P^{​ 1 ​ ​} = P^{​ 2 ​ ​}

\frac{​ F ^{​ 1 ​ ​} ​ ​}{​ A ^{​ 1 ​ ​} ​} = \frac{​ F ^{​ 2 ​ ​} ​ ​}{​ A ^{​ 2 ​ ​} ​}

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P^{​ 1 ​ ​} = P^{​ 2 ​ ​}

\frac{​ F ^{​ 1 ​ ​} ​ ​}{​ A ^{​ 1 ​ ​} ​} = \frac{​ F ^{​ 2 ​ ​} ​ ​}{​ A ^{​ 2 ​ ​} ​}

Rearranging the formula!

Write out in words what each symbol stands for

F^{​ 1 ​ ​} \cdot A^{​ 2 ​ ​} = A^{​ 1 ​ ​} \cdot F^{​ 2 ​ ​}

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0.01 m2

0.4 m2

20 N

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P^{​ 1 ​ ​} = P^{​ 2 ​ ​}

\frac{​ F ^{​ 1 ​ ​} ​ ​}{​ A ^{​ 1 ​ ​} ​} = \frac{​ F ^{​ 2 ​ ​} ​ ​}{​ A ^{​ 2 ​ ​} ​}

If you're done, start reading paragraph 8.5 and working on the workbook exercises of 8.5

F^{​ 1 ​ ​} \cdot A^{​ 2 ​ ​} = A^{​ 1 ​ ​} \cdot F^{​ 2 ​ ​}

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Hydraulics

In a hydraulic jack a force of 20 Newton is applied to a piston with an area of 0.20 m2. The area of the other piston is 2.0 m2.

a) What is the pressure transmitted through the liquid?

b) What is the force applied to the other piston?

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Lesson 11

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