THRUST & PRESSURE

Thrust

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

Unit = Newton (N)

Pressure

The effect of thrust per unit area is called pressure.

Pressure =thrust/area

Unit – Pascal (Pa)

1 Pa = 1 N / 1m2

Pressure depends on two factors

1.force(thrust)-more force more pressure

2.area -more area less pressure

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

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.

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.

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

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

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

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

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

Submitted to:- Mrs. Mamta mam

Submitted to :- Vikrant

choudhary