4. PRESSURE
The effect of thrust per unit area is
called pressure.
Pressure =thrust/area
Unit – Pascal (Pa)
1 Pa = 1 N / 1m2
5.
6. PRESSURE DEPENDS
ON TWO FACTORS
1.force(thrust)-more force more pressure
2.area -more area less pressure
7. “THE SAME FORCE
PRODUCES LESS PRESSURE
IF IT ACTS ON A LARGE
AREA BUT CAN PRODUCE
LESS PRESSURE IF ACTS
ON A SMALL AREA.”
8. 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.
9.
10. 2.S HARP KNIFE CUTS BET TER THAN A
BLUNT KNIFE SO THE FORCE OF OUR HAND
FALLS OVER A VERY SMALL AREA OF
OBJECT PRODUCES LARGE PRESSURE .
11.
12. 3.THE TRACTOR HAVE BROAD
TYRES SO THERE IS LESS PRESSURE
ON GROUND AND DO NOT SINKING
TO COMPARATIVELY SOFT FIELD.
13.
14. 4.IT IS EASIER TO WALK ON
SOFT SAND IF WE HAVE FLAT
SHOES RATHER THAN SHOES
WITH SHARP HEELS.
