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pressure & application

Dec 23, 2014

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VIKKU390

 
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Page 1: pressure & application
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THRUST & PRESSURE

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Thrust

The force applied on a surface in a direction perpendicular to the surface

Unit = Newton (N)

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Pressure

The effect of thrust per unit area is called pressure.

Pressure =thrust/area

Unit – Pascal (Pa)

1 Pa = 1 N / 1m2

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Pressure depends on two factors

1.force(thrust)-more force more pressure

2.area -more area less pressure

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“The same force produces less pressure if it acts on a large area but can produce less pressure if acts on a small area.”

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Every day observation 1.School bags have wide straps so

the weight of bag may fall over a large area of the shoulder of the student producing less pressure on shoulder.

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Sharp knife cuts better than a blunt knife so the force of our hand falls over a very small area of object produces large pressure.

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The tractor have broad tyres so there is less pressure on ground and do not sinking to comparatively soft field.

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It is easier to walk on soft sand if we have flat shoes rather than shoes with sharp heels.

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The foundations of buildings and dams are laid on a larger area to produce less pressure

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>A wide belt is provided over the wheels of an army tank.

>The wooden or concrete sleepers are kept below the railway line.

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Submitted to:- Mrs. Mamta mam

Submitted to :- Vikrant

choudhary

Page 14: pressure & application