pressure on liquid.pptx

7/27/2019 PRESSURE ON LIQUID.pptx

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PRESSURE

1. Pressure on solid2. Pressure on liquid

3. Pressure on gases

Standard

Competence

Basic

Competence

Learning

Objective

Learning

Material


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STANDARD OF COMPETENCE

Comprehending

work, force, and

energy role in dailylife.


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BASIC COMPETENCE

To search the

Pressure on solid,

liquid and gas thing

and its application in

life


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LEARNING OBJECTIVES

1. To find relation between force , pressure and length of area

with force through experiment.

2. To apply the connecting receptacle in life

3. To describe the Pascals Law and Archimedes law by simple

experiment, also the Application life.

4. To show several technology product in life connected with

the concept of floating,flying, Sinking thing.

5. To go around to find the pressure concept


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PRESSURE ON LIQUID

1.Hydrostatic pressure

2.Pascals Law

3.Archimedes principle


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hA

A

Hydrostatic Pressure


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hB

B



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hc

C



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A

B

C

hc > hB > hA

So, hydrostatic pressuredepend on what?

Depth (h)


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HYDROSTATIC PRESSURE

Object in water get

pressure from every

side.

Magnitude of that

pressure depend on

that depth.


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Hydrostatic pressure depents on:

Density of liquid () kg/m3

Gravitational acceleration (g)m/s2

Depth (h)m

We can formulated as :

Ph = () (g) (h)


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CONNECTED VESSELS


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CONNECTING VESSELS

A B C D


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Which point has biggest pressure?

A

B

C

D


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EXAMPLE

Water is poured into a glass. The density ofwater is 1000 kgm-3 (g = 10 m/s2). What is the

hydrostatic pressure at point A?

5 cm

4 cm

A


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ARCHIMEDES PRINCIPLE

012

N45

6

8

3

0 12

N

4

56

8

3

Archimedes principle

An object, wholly or partly in afluid, is buoyed up by a force equal

the weight of the fluid displaced

by an object

The buoyant force = to the weight

of the placed water


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FA = wf

FA = m . g

Remember : m = . Vf

So,

FA = . Vf . g


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Buoyant

force

w

Weight in water = weight in air a buoyant force


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EXAMPLE

A block of dimension of length 40 cm, width

30 cm, thick 20 cm is put into gasoline with

density of 900 kg/m3. if Earth gravitational

acceleration is 10 m/s2, what is the magnitudeof the buoyant force experienced by the block.


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SINKING, FLOATING, and DRIFTING

Sinking,

object > fluid

Drifting, object= fluid

Floating,

object < fluid


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SINKING, FLOATING, and DRIFTING


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Application Archimedes Law

Submarine


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