Effect produced due to force is more when the surface
area is smaller and less when the surface area is larger.
One edge of drawing pin is
flat while another is sharp
It is easier to cut with
sharp knife rather
than blunt one.
Vertically placed brick soaks more in mud then horizontally placed
Force exerted on surface area on one unit is called Pressure. Pascal is the
unit of Pressure.
Pressure = -------
Standstill Liquid and Gas exerts pressure
Pressure exerted on earth because of
atmosphere is called Atmospheric Pressure
Effects of atmospheric pressure
At sea level the atmospheric pressure is more
As we go higher the pressure decreases. It becomes difficult
to breathe as we climb higher.
Atmospheric Pressure changes according to time and place..
Due to this difference in pressure, wind blows.
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